Categories
BLOG

how fast does weed grow

Growing Cannabis As Fast As Possible: What You Need To Know

Use these tips to speed up your grow at any point between germination and harvest. Learn practical ways to make things go faster in either veg or flowering, inside or out. Don’t be surprised if one of the tricks for outdoor growers is a bit shocking. We weren’t expecting it either!

Contents:

There are plenty of reasons you might want to harvest early. Perhaps you’re moving house and have to pack up your grow room, or you grow outdoors in a northern country where the autumns are short, cold, and brutal. Perhaps you’re low on weed and hate to fork over your hard-earned cash in exchange for your meds. Maybe you live in a not-so-cannabis-friendly place and you think LEO is onto you.

No matter the reason, there are proven ways to rush things along, whether you’re growing inside or out. Still, you might have to compromise yield and potency in exchange for speed. Let’s take a look at what you can do to grow cannabis as fast as possible.

TIPS FOR FASTER INDOOR GROWS

Growing indoors is almost always faster than growing outdoors, mostly because you can control the lighting. You can tweak a few other things in the name of speed too.

GROW AUTOFLOWERING CANNABIS

As a general rule, autoflowering cannabis will mature at a faster rate than photoperiod strains because they contain a percentage of ruderalis genetics. Ruderalis evolved naturally in cold places like Siberia where the summers are very short. They had to develop the ability to produce flowers and seeds quickly to ensure the survival of the species.

Most autoflowering hybrids will start to flower two weeks after germination, and can be harvested about 7 weeks later. Quick One, for example, completes its full life cycle in 8 weeks and still yields up to 150g/plant.

Note that breeders are now reducing the amount of ruderalis they use to create autoflowering hybrids in order to increase yield and potency. As a result, some may take a little longer to be harvest-ready, or require a 20/4 or 18/6 light cycle for flowering.

Quick One
Strong Indica x Ruderalis
275 – 325 g/m 2
50 – 60 cm
5 – 6 weeks
THC: 13% (aprox.) / CBD: Low
10% Sativa, 60% Indica, 20% Ruderalis
100 – 150 g/per plant (dried)
60 – 100 cm
8 – 9 weeks after germination
Physical
Quick One
Strong Indica x Ruderalis
275 – 325 g/m 2
50 – 60 cm
5 – 6 weeks
THC: 13% (aprox.) / CBD: Low
10% Sativa, 60% Indica, 30% Ruderalis
100 – 150 g/per plant (dried)
60 – 100 cm
8 – 9 weeks after germination
Physical

TAKE PHOTOPERIOD STRAINS STRAIGHT TO FLOWER

You can force photoperiod strains to mature almost as fast as autoflowering cannabis by putting them in 12 hours of darkness every day from the time they germinate. It works, but your plants will not get nearly as big or yield as much as if you had allowed them to veg for the normal 4–6 weeks.

If you want to use this method, you can start with either clones or seeds, but you’ll need to grow a lot of them in sea of green (SOG) fashion if you want enough herb to hold you over to your next harvest. Most plants will be dwarf-sized and only yield 28g or less each.

VEG WITH LIGHTS ON 24 HOURS A DAY

This is a hotly debated topic, but you can leave your lights on 24/7 and your cannabis plants will be just fine. Unlike some other plants, they don’t need a dark period each day to be healthy. In fact, they’ll stay shorter, grow faster, and get bushier under a continuous light period.

By keeping the lights on all the time, you may be able to cut your veg time by a third and still have a good-sized plant by the time you start a forced bloom. If you try this technique, keep a close watch for deficiencies. If your plants look like they’re getting sick, reduce the wattage or hours of light to help them recover.

GIVE YOUR PLANTS LESS THAN 12 HOURS OF LIGHT PER DAY DURING BLOOM

If you’d like to jump-start the flowering process, put your plants in complete darkness for 48 hours before you start the 12/12 light cycle. Then, use a 11/13 light cycle throughout bloom. The extra reduction will trick your plants into thinking winter is rapidly approaching.

Starving a plant that wants to bloom for 9–10 weeks to force an early harvest can have a negative impact on yield. If you’re going to try this method, choose a cannabis seed with a naturally short finish time like Honey Cream. This is a high-yielding indica that only needs 6–7 weeks to complete its flowering cycle.

Honey Cream
BlueBlack x Maple Leaf Indica x White Rhino
500 – 550 gr/m 2
60 – 100 cm
6 – 7 weeks
THC: 16% (aprox.) / CBD: Medium
35% Sativa, 65% Indica, 0% Ruderalis
625 – 675 g/per plant (dried)
180 – 250 cm
Early October
Psychedelic high
Honey Cream
BlueBlack x Maple Leaf Indica x White Rhino
500 – 550 gr/m 2
60 – 100 cm
6 – 7 weeks
THC: 16% (aprox.) / CBD: Medium
35% Sativa, 65% Indica, 0% Ruderalis
625 – 675 g/per plant (dried)
180 – 250 cm
Early October
Psychedelic high

CONSIDER SWITCHING TO HYDRO

Compared to soil or a soilless mix, hydro can reduce your veg time by a few weeks. This method delivers nutrients directly to the plant’s roots so that they practically grow right before your eyes. It won’t make the flowering period go much faster, but hydro usually produces heavier, denser buds and bigger yields. You might decide that, in this case, the time was well spent.

PROPER NUTRITION HELPS… A LOT

Sick plants need time to recover, so every time you overfeed, underfeed, or feed the wrong thing, you’re stretching the time until harvest. If you’re using nutrients designed for cannabis, they should come with instructions that tell you how much of what to use, and when to use it. Follow the directions, but keep the mix on the light side until you know if your plants are nutrient-sensitive.

Cannabis needs more nitrogen (N) when vegging and more phosphorus and potassium (P & K) while flowering. If you give then too much nitrogen during bloom, it’ll slow down bud growth and result in lower yields of fluffier buds. That’s the exact opposite of what you want!

Easy Combo Booster Pack

TIPS FOR FASTER OUTDOOR GROWS

Harvesting early outside is a little tricky. The obvious answer is to use autoflowering strains—and this does work. Depending on your weather, you may be able to harvest at least three times each growing season. Outdoor growers can also make photoperiod strains mature a little faster. Here are two things to try.

COVER OUTDOOR PLANTS TO FORCE BLOOM

Cover your outdoor plants with a tarp or other light-proof cover in the early evening and remove it the next morning. This works just like a grow tent to give your plants 12 hours of darkness each day to force them to bloom. As a bonus, you’ll end up with bigger, denser, more resinous buds when you’re done because the sunlight they do get, during the height of summer, will be much more intense than what they would receive during the fall months when outdoor cannabis plants normally bloom.

POLLINATE LATE, HARVEST EARLY

This last tip might shock you. Pollinate your flowers and they’ll ripen faster.

This doesn’t mean you’ll ruin your grow with a bunch of seeds. Pollinate by hand about a week before you want to harvest. As soon as the buds are fertilised, the plant will switch its energy away from flower formation to seed production and the maturity rate will escalate. The next week, when you harvest, the seeds won’t even be noticeable because they haven’t had time to form a hard shell.

CANNABIS SEED SELECTION IS KEY TO FASTER GROWING

If you want to grow cannabis as fast as possible, choosing a seed that’s been bred to mature quickly is key. It’s only common sense that it will be easier to hurry along a strain that will finish on its own in 7 weeks than one that prefers 12. Luckily, fast strains have been bred to meet every need and preference.

For those who prefer autoflowering hybrids, Northern Light Auto is a great choice. The original was already fast, but this improved version can go from germination to harvest in 10 weeks or less without any extra measures. Royal Cheese is a photoperiod strain, but this European favourite only needs about 6 weeks of 12/12 lighting to reach full maturity. Medical marijuana patients who are on a tight schedule should take a look at Medical Mass. This variety only needs 7 weeks of bloom to yield up to 550g/m² of CBD-enriched flowers.

CONCLUSION—HOW TO SPEED UP YOUR CANNABIS GROW

If you need to force your plants to mature faster than they naturally would, you can by trying one or more of the methods described above. Doing so, however, means that you will probably sacrifice both yield and potency in the process. For the best results, choose a cannabis seed that’s been bred specifically for speed. With the right genetics, you can minimise any type of compromise that you may have to make.

If you need to hurry your grow for an early harvest, this practical guide will show you how to speed things up, inside and out.

How Long Does It Take to Grow Weed Indoors?

This is one of the most common questions we receive from curious soon-to-be indoor cannabis growers: How long does it really take to grow weed? What’s the growing timeline?

It’s actually a really good question! Every new marijuana grower should know how much work they’re signing up for! The short answer is…

The Average Indoor Grow Takes 3-5 Months

The long answer is: from Day 1 of your weed plant’s life to actually smoking your harvest, it can take… 8 weeks – 7+ Months! That’s a huge range, right?

That’s why most cannabis growers won’t give you a straight answer. The truth is, there are many factors will affect the total time until you have ‘ready’ buds, by days, weeks or even months. This includes your strain, your setup, and how big you plan to grow your plants (bigger plants need more time!). So instead of giving you a huge range, an easier-to-swallow answer might be to say that the average grow takes 3-5 months for indoor growers.

This includes the time needed to grow your cannabis plant from seedling to harvest plus an additional 2 weeks (or more) which is used to cure your cannabis buds after harvest (making them more potent and better smelling).

Additionally, for at least the first time you grow, you also need to consider the time needed to get your equipment and seeds/clones.

This article will give you the total time breakdown, so you can plan out the details of your grow in order to achieve the harvest times you desire:

Ultimately, How Long to Harvest Marijuana Depends on the Desired Yields, Strain and Grow Style

Today I will show you how to plan your grow so it takes the amount of time you want!

Jump to the Section of the Tutorial You’re Interested in:

  1. Before You Start Growing Weed (0-4 weeks) – Get seeds and supplies so you’re set to start growing!
  2. Time Needed to Grow Weed, From Seedling to Harvest (8 weeks – 5+ months)
  • Germinate Your Seeds (1-7 days) – Learn about fail-proof methods to germinate perfectly in soil/coco or hydro.
  • Vegetative Stage (3 weeks – 8+ weeks) – In the vegetative stage, the cannabis plants are growing just stems and leaves. On average, most indoor growers vegetate their plants for 4-8 weeks. Seedlings are able to start flowering as early as 3 weeks from germination, but the resulting plants will be tiny. Most growers choose to let plants vegetate for longer because giving them more time to grow results in bigger plants, which tend to produce bigger yields as long as you have enough light to cover all the bud sites. That being said, you can still produce quite a bit of bud with a lot of small plants growing at once as long as you fill up your grow space.
  • Flowering Stage (5 weeks – 16+ weeks) – This is when plants start making buds. The length of the flowering stage depends heavily on the strain/genetics, with an average of about 8-12 weeks for most strains. Some strains are bred to have very short flowering stages (for example, most auto-flowering strains will naturally start flowering at around 3 weeks old and some are ready to harvest just 5 weeks later, for a total of only 8 weeks from seed!). Other strains can take months in the flowering stage before they’re ready to harvest. Typically, longer-flowering strains produce higher yields than short-flowering ones because the buds are exposed to more light-hours and have more time to fatten up, but that’s not always the case.
  1. Post-Harvest (This is when the smell/taste/look you love shows up) (2-4+ weeks) – After buds are harvested, they still need to be dried for about a week (sometimes a bit less or more), then placed in glass jars to “cure” for at least 2 weeks. This post-harvest processing dramatically improves the taste, smell and the perceived potency of the buds. It also reduces the chance of buds causing headaches or unpleasant “speedy” effects. Don’t skip this step! It will account for nearly 50% of your final bud quality! Learn how to dry & cure your buds to perfection.

If you choose the right strain, you could be smoking your own buds as soon as 3 months from germination!

Before You Start Growing Weed

Total preparation time needed: 0 days – 4 weeks

Here’s the breakdown…

Get equipment: 0 days – 2 weeks
This includes purchasing your equipment and/or waiting for it to show up in the mail. Once you have your marijuana growing supplies, you’ll need to setup your growing area and equipment. Depending on how you purchase your equipment and how quickly you setup, you could be ready the same day or in two weeks (after factoring in shipping time).

Check out examples of new grower shopping lists to learn exactly which supplies you’ll need.

Get seeds or clones: 0-4 weeks:
If you have instant access (like knowing a grower, or ordering seeds from a seed bank in your country), this should take only a little time. If you order from a seed bank overseas (especially US residents), expect a wait of about 1-4 weeks to get seeds.

Time Needed to Grow Weed, From Seedling to Harvest

Total growing time needed: 8 weeks – 5+ months

Here’s the breakdown…

Seedling Stage
Germinate your seeds: 1 – 7 days
Seedlings can sprout in as little as a day, but by 3-5 days they should be good to go. If you have access to clones, you can skip this wait.

Learn my fail-proof method to germinate your seeds in soil/coco or hydro.

Vegetative Stage
Vegetative Stage: 3 weeks – 2+ months.
The length of this stage is a matter of personal preference. Most cannabis plants need at least 3 weeks in the vegetative stage before they will start making flowers, but after that you get to choose how long your plant spends in this stage (unless using an auto-flowering strain), because you’re the one to ‘flip the switch’ and get your plant to enter the next life stage: flowering.

When you start with a seed, even with an auto-flowering plant, you will always have at least 2-3 weeks of vegetative growth before any buds start forming no matter what you do. Growers generally allow their plants to stay in the vegetative stage from a few weeks to a few months.

The size your plant achieves in the vegetative stage has a very large effect on your final yields since bigger plants produce more bud sites than smaller plants. However, you need enough light to cover all the bud sites or they will never develop properly. Light is like food for bud growth!

These vegetating plants are about 4 weeks old from germination

To give you an idea as to what your FINAL marijuana plant may look like depending on how long it spends in the vegetative stage…

This plant didn’t spend any time in the Vegetative Stage. It was given 12-12 lighting almost immediately after sprouting. It’s so small that it spent its whole life in a solo cup, and its only light came from CFLs. I weighed down the bottom of the cup so it didn’t fall over. It ended up yielding about 0.75 oz.

These auto-flowering plants spent about 3 weeks in the vegetative stage before they automatically started flowering, and were ready to harvest just 5 weeks later. They were about a foot tall at harvest and yielded approximately 2 ounces each. Read the step-by-step tutorial to grow plants exactly like this.

This marijuana plant spent about 6 weeks in the vegetative stage before being changed over to flowering and yielded just over 6 ounces at harvest. View the complete grow journal with instructions on how to grow your plant so it looks just like this at harvest!

These cannabis plants were vegetated for about 8 weeks before being flipped to the flowering stage. Although they were grown in the exact same conditions from seed to harvest, their final heights are remarkably different because their strains had vastly different genetics. The smaller plant produced 6.6 ounces, while the big plant produced 9.3 ounces. Strain can make a big difference! Learn about growing different strains together.

These cannabis plants were vegetated for about 9 weeks before being flipped, in the exact same setup as above, and produced over 10 ounces each. Besides an extra week of veg, the biggest difference between this grow and the one above was simply the strains.

This human-sized plant (one of my very first plants) spent a little more than 3 months in the vegetative stage before I realized I needed to turn it over to the flowering stage. It then spent another 12 weeks in the flowering stage before it was ready to harvest because it was a long-flowering strain. It got way too tall for its space (taller than me!) and started falling over. However, despite the huge size and more than 5 months of growth, it only ended up yielding about 6 ounces. This is because it was under weak CFL grow lights. Though there was a lot of buds, the lack of strong light made them airy, without a lot of weight. Click the picture for a close-up. 🙂

Some people put their seedlings or clones right into the flowering stage if they want to harvest quickly though this makes for extremely small plants. For example, super-stealth growers who are growing in small hidden spaces – like out of a computer case – would want to put their seedlings into flowering nearly right away to keep their plants as small as possible. It’s also important to remember that container size and grow lights make a big difference. Small containers constrain the roots and keep plants from getting as big as they could, and small lights prevent buds from fattening up as much as they could.

I personally recommend at least 4 weeks in the vegetative stage with 18+ hours of light each day for the best results. Plants that are forced to start flowering sooner than 4 weeks don’t yield much compared to how much work you put in. That being said, keeping plants relatively small does have some benefits!

A good rule of thumb…

Your plant will likely double in size (maybe a bit less, maybe more) from when you first put it into the flowering stage; this is known as the Flowering Stretch. So make sure you end the vegetative stage before your plant reaches half the final height you want, or your cannabis plants may outgrow your grow space during the flowering stage!

Flowering Stage
Flowering Stage: 5 weeks – 16+ weeks

Here’s the breakdown…

  • Week 1-3 – Transition to Flowering
  • Week 3-4 – “Budlets” Form
  • Week 4-6 – Buds Start Fattening Up
  • Week 6-8 – Buds Ripen, Pistils Darken – some strains spend longer in this stage
  • Week 8-12+ – Flowering Ends, Final Flush, Harvest

The length of time needed to stay in the flowering stage depends heavily on the strain. Once you have switched your plant into the flowering stage they will stretch (the ‘flowering stretch’), form buds and then fatten.

Here’s a list of some of my favorite and best cannabis strains by the length of the flowering period:

Short (6-8 weeks)

  • Northern Light – Known for being especially easy to grow
  • Critical Mass CBD – High-yielding, medical, high-CBD, medium-THC strain
  • Quick Critical + – Based on their award-winning Critical+ strain but with a much faster finish
  • Blue Cheese – This version of Blue Cheese is not only fast flowering, the plants grow fast and should be flowered when the plant is only 1/3 the final desired size because it may triple in height after the switch. This shaves extra time off the vegetative stage. Great effects!
  • Frisian Dew – One of the best strains for outdoor growing (and buds may turn pink or bright purple!)
  • Shiskaberry – A gem by Barney’s Farm, this strain “lifts you up” and causes a strong “head high” that can be a great way to relax after a tough day, or for when you want to get in a creative mood.
  • Auto-flowering Ultimate – One of the most potent auto-flowering strains I’ve grown so far, ready in about 10 weeks from germination (7-week flowering stage) and just overall a healthy and high-yielding plant. I plan on growing another one in my next auto-flowering grow!
  • In fact, if you’re interested in a very short flowering time, most auto-flowering strains are ready to harvest less than 3 months from seed.

Frisian Dew plant growing outdoors with deep purple buds

Medium (8-12 weeks)

  • Original Amnesia – Strong effects and very easy to grow. View grow journal
  • Supreme CBD Durban – Medical strain, has a THC:CBD ratio of 1:1
  • Pineapple Chunk – An award-winning strain that’s fruity, vigorous and potent! Its yields are not necessarily the highest, but I believe it’s worth it for the extremely high quality of buds. One of my favorite strains I’ve grown, and I definitely plan to grow it again!
  • Liberty Haze – An award-winning strain that’s curiously strong and one of the few “haze” cannabis strains that doesn’t take forever to finish flowering. Good yields!
  • Gelat.OG – An amazingly well-done cross between Gelato and OG Kush, which are two extremely popular strains in the US on the west coast. Finishes on the faster side, yet has great yields, potency and smell!
  • Wedding Gelato – Another beautiful Gelato cross, this time with the famous Gelato 33 clone (a very specific cut of Gelato), with Wedding Cake (which has taken the west coast by storm in the last few years).
  • Strawberry Lemonade – As pleasant as it sounds, with high potency and uplifting effects. Also is typically very easy to grow.
  • Gorilla Zkittlez – Another west coast favorite, this is produces beautiful buds that are covered in crystals/trichomes and is also very high yielding.
  • Peyote Critical – This strain seems to get rave reviews from everyone who tries it. Buds produce powerful effects and occasionally the buds even turn purple.

Long: (12-14+ weeks)

  • Many Haze strains, as well as some Sativa strains, and generally any strains that originated near the equator.
  • Arjan’s Ultra Haze #1 – A cross between some of the best Haze strains in Southeast Asia. If you want to try something different that is almost impossible to find in the US or Europe, this is it! It produces psychedelic effects that defy its cannabinoid content. May be too intense for some people!

In general, most strains (besides auto-flowering strains) are in the medium range as far as how long they take to flower.

It’s not exact – There’s a 2-3 week harvest window for most plants, and keeping your plants in the flowering stage for a bit longer tends to increase your yields. This is because the plants tend to really bulk up their flowers once they’ve become ‘ripe’.

So often times, even though you could harvest at the shortest recommended time, waiting an extra week or two will give you an extra 10-30% more yield compared to harvesting as early as possible.

Utopia Haze is a mix of Brazilian landrace strains

Post-Harvest (before you smoke you should do this stuff too)

Total post-harvest time needed: 2.5 weeks – 1.5+ months

Drying: 4 – 10 days
Good marijuana buds can be dried in as little as 4 days, but ideally, drying should be a slow process taking up to a week or more. Making sure your plants have been thoroughly dried (but not over-dried) will lower chances of mold during the curing process.

Curing: 2 weeks – 1+ months
Curing really seems to make the effects of buds feel less ‘speedy’ and be better suited to medical applications like treating anxiety, reducing pain, and improving feelings of depression.

Additionally, curing gets rid of any ‘cut grass’ smell, harsh taste and other undesirable traits of some freshly dried buds. Over time with proper curing, those traits will be replaced by the ‘real’ smell and potency profile of your buds.

Two weeks is considered the minimum time to cure your buds, but I personally cure all my buds for a month or even a bit longer because the buds continue to improve for several more weeks.

So, after you’ve bought seeds and equipment, grown a plant from seed to harvest, trimmed, dried and cured your buds, that brings us back to the original answer…

Total Time to Grow (and Be Ready to Use) Your Own Weed:
8 weeks – 5+ Months

Average Time to Grow (and Be Ready to Use) Your Own Weed:
3 – 5 months

If you haven’t started growing your own weed yet, today is the day!

New Grower Shopping Lists – What You Need to Get Started

How to Grow a Pound of Cannabis – Step-by-Step Instructions from Seed to Harvest

7 Tips for Growing Top-Shelf Buds – How to Grow Better Cannabis than the Dispensary!

How Long Does It Take to Grow Weed Indoors? This is one of the most common questions we receive from curious soon-to-be indoor cannabis growers: How long does it really take to grow weed?