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how long does it take to grow autoflowering weed

By day 42, the plants will begin to fill out and take on a stacked and chunky appearance. The internodal spacing will become filled with flower sites, and the height of the plants will begin to slow down, as all energy is spent on flower production. The resin will begin to form very quickly covering the buds, with the aroma and terpenes making themselves well known. Plant height will range between 70-125cm

• Grow Tip: It is a great idea to add support such as bamboo stakes or a net trellis around the plants. Over the next 5-6 weeks they will focus on producing as much weight as possible.

• Grow Tip: By this point, the plants will display lots of different colors from deficiencies to end of seasonal colors, such as purples, pinks, and magentas.

Week 6

• Grow Tip: Now the plants will depend on frequent amounts of nutrient solution, and using supplementary boosters and enzymes is an option to increase flower and resin production further.

It is best now to reduce the amount of Nitrogen you are giving the plants, as their primary focus will be Phosphorus and Potassium. It is the P and K that encourage the plants to grow pre-flowers and strong stems and side branches in preparation for a heavy harvest. Sativa dominant hybrids should be tied down here if the height is an issue.

Once you have hit the 10-week mark, your autoflowering plants will be fully mature and ready to harvest. The buds will be as thick as golf balls and should have filled every branch and internodal spacing. The terpenes will be the most aromatic, they can be, with the buds encrusted with trichomes, including the surrounding leaves. At this point, you are ready to get your trimming scissors out and begin harvesting the plants.

Now you are halfway through your growth cycle and will notice the growth structure and appearance of the plant will be growing tall, bushy, and with high resistance to strong winds.

How long until harvest?

In some cases, growers with a lot of experience, great starting genetics and perfect conditions can yield up to 6 ounces per auto-flowering plant or more.

Can I use plant training methods on auto-flowering strains?

This makes auto-flowering buds an attractive choice for some medical marijuana patients who are looking for higher CBD cannabis strains. There are also auto-flowering strains that are bred principally to be high in CBD. It’s difficult for many growers get clones of one of the famous high-CBD photoperiod strains, and auto-flowering strains can make it easier for some patients to get access to CBD.

Are Autos Easier to Grow?

For insights, we turned to Growdiaries which is a large enough growing community to contain many answers.

This wasn’t always the case. Just a few years ago, it was a common complaint on forums that an autoflower keeps growing. Obviously, the expression of ruderalis genes in such a plant was too weak, so it wouldn’t flower at 24/0 or 20/4. Sometimes, even a 18/6 light cycle was too much. People were advised to switch to something like 16/8, 14/10, or even 12/12. There’s even a term for this type of plants — superautos. Superautos tend to be big and high-yielding, but take forever if you treat them like normal autos. Today’s breeders do their best to create autoflowering varieties that never require any changes in light schedule.

Seed producers have traditionally selectively bred cannabis for the earlier onset of flowering and shorter life cycle, but Nature beat them to it. That is to say, it ‘created’ Cannabis ruderalis, a small-statured feral plant that is adapted to very short Siberian or North European summers. Breeders have learned to add ruderalis DNA to traditional varieties to create autoflowers.

How Long Do Autoflowers Really Take?

As you can see, these 4 breeders specify autoflower time from seed to harvest more or less realistically. Many growers really do cut down their plants within the given timeframe, and for others, their autoflower seed to harvest time is even shorter. Nevertheless, there are many instances where growers had to wait several weeks longer.

Table of Contents

Frankly, we didn’t see any pattern here. Please look at the tables below for yourselves. As you can see, we have sorted all grows by the length of the cycle — shorter cycles first. If LST/HST methods really affected the length of the grow, they would cluster at the bottom of each table. This doesn’t seem to be the case.

Indoors, you can use any light schedule — from 12/12 and all the way to 24/0. Whatever is most convenient to you. It’s because longer light hours usually don’t affect autoflowers flower time.