How long does it take to grow cannabis indoors

Many novice growers will be curious: How long does it take to grow cannabis indoors? What’s the growing timeline?
This is a very good question, Every new cannabis grower should know how much work they’re signing up for!

How long does it take to grow cannabis indoors

Indoor cannabis growth takes about four months

In fact, it takes only 3 months for marijuana to grow from germination to smoking, and it may take up to 5-6 months for slow growth, which is a large range.

This means that most growers will not give you an accurate answer, because there are many factors that affect time, including your strains, settings, and the number of plants you plan to grow (no doubt, the larger the plant, the more Long time!), therefore, the more acceptable answer may be that the average growth time of indoor planting takes 4 months.

This includes the time from planting the cannabis plant from bud to harvest, plus two weeks of drying and pickling. Pickling can make the cannabis taste better.

In addition, if you are planting for the first time, you also need to consider the time to obtain equipment and installation and commissioning.

Ultimately, the time to harvest cannabis depends on the required yield, strains and cultivation methods


The time it takes to grow hemp, from seedling to harvest

Sprouting seeds (1-7 days)-learn how to germinate perfectly in soil/cocoa or hydroponics
Vegetative stage (average 4-8 weeks, length depends on the size of the desired plant)-in the vegetative stage, the cannabis plant only grows stems and leaves. On average, most indoor growers plant their plants for 4-8 weeks, and seedlings can bloom within 3 weeks of germination, but the plants are still small at this time, and most growers will choose to let the plants continue to grow. Because larger plants can bring greater yields.
Flowering period (8-10 weeks on average, depending on the strain)-The length of the flowering period depends largely on the strain or DNA, and the average time for most strains is 8-10 weeks. Generally, varieties with longer flowering periods have higher yields, while varieties with shorter flowering periods have lower yields. For example, some auto-flowering varieties will naturally begin to bloom at about 3 weeks old, while some varieties can be harvested after 5 weeks. Buds exposed to more light have more time to grow and usually yield higher, although this is not always the case.

After harvest-After harvesting the buds, drying them for about seven days and then marinating them in a glass jar for about two weeks will significantly improve the taste, smell and perceived efficacy of the buds. It also reduces the chance of flower buds causing headaches or unpleasant “quick” effects. Don’t skip this step! It will account for nearly 50% of your final bud quality!

Total growth time required: 4 months on average

Seedling stage

Seed germination: 1-7 days
Seedlings can germinate after 3-5 days

cannabis sprouting

Plant stage

Plant stage: 4-8 weeks on average (if you want plants to grow bigger, it may take longer)

Most cannabis plants take at least 3-4 weeks after germination to bloom, but after that you can choose how long your plant spends at this stage, because you are the one who takes the plant into the next life stage: flowering.

Growers usually keep their plants in the vegetative phase for a few weeks to several months, because the size of the plant has a very large impact on the final yield. Larger plants will produce more buds than smaller plants. However, you There must be enough light to cover all the bud spots, otherwise they will not grow up normally.

These vegetative plants are about 4 weeks old from germination

To give you an idea of what your final cannabis plant might look like, depending on how long it spends in the vegetative phase…


This plant does not have any time in the vegetative period, so that its whole life is spent in this small medium, and the final yield is only 0.8 ounces.


These auto-flowering plants took about 3 weeks in the vegetative phase before they automatically began to bloom, and were ready for harvest 5 weeks later. They are about 1 foot tall when harvested, and each yields about 2 ounces.


The marijuana plant spent about 6 weeks in the vegetative phase before turning to flowering, yielding slightly more than 6 ounces at harvest.


These cannabis plants were planted for approximately 8 weeks before entering the flowering stage. Although they grow under exactly the same conditions from seed to harvest, their final heights are completely different because their strains have completely different genetics. The smaller plant produced 6.6 ounces, while the big plant produced 9.3 ounces.

Flowering stage

Flowering period: (average 8-10 weeks, length depends on strain/genetic)
Flowering phase schedule

  • Week 1-3-Transition to flowering
  • Week 3-4-“Budlets” form
  • Week 4-6-Bud starts to gain weight
  • Week 6-8-buds mature and pistils darken-some strains take longer at this stage
  • Week 8-12+-Flowering ends

The time required to maintain the flowering stage largely depends on the strain. Once you switch the plants to the flowering stage, they stretch (“flower stretch”), form buds, and then fatten.

After harvest (you should also do these things before you smoke)

Drying: about 7 days

Cannabis buds can dry in 4 days, but ideally, drying is a slow process that takes 7 days or more.

Marinating: about two weeks

Pickling can make the effects of buds feel less rapid and is more suitable for medical applications, which can treat anxiety, relieve pain and improve depression.

Related articles recommended:Beginner’s Growing Guide: Indoor Cannabis Grow


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