How Long Does It Take Cannabis to Grow?

How long does it take for a cannabis plant to grow? This is a question with a lot of variables. The answer depends on many factors such as the type of cannabis, the climate, and the growing conditions.

Checkout this video:

The Growth Cycle of Cannabis

Cannabis has a reputation for being a fast-growing plant, and in many ways, that reputation is deserved. A properly grown cannabis plant can double its height in a matter of weeks, and produce an abundance of flowers in just a few short months.

However, it is important to keep in mind that the rapid growth of cannabis is largely due to the fact that it is an annual plant. This means that the vast majority of its life cycle is spent growing as quickly as possible in order to produce seeds before the onset of winter. In other words, while cannabis may be capable of growing quickly, it is not capable of sustaining that growth indefinitely.

The average cannabis plant will take approximately three to four months to go from seedling to harvest-ready adult. However, this figure can vary depending on a number of factors, such as the type of cannabis being grown, the growing conditions, and the experience of the grower.

The Different Stages of Cannabis Growth

Cannabis growth can be divided into several different stages, each with their own distinct set of characteristics. The vegetative stage is when the Cannabis plant is growing leaves and stems, and is the longest stage of growth. The flowering stage is when the plant begins to produce buds, and is the shortest stage of growth. The final stage of growth is the ripening stage, when the buds mature and are ready to be harvested.


The first stage of the cannabis growth cycle is germination. This is when the seed sprouts and a small plant begins to grow. For most cannabis strains, germination takes between 24 and 48 hours. However, some strains can take up to 10 days to germinate.

After germination, the next stage is the vegetative stage. This is when the plant starts to grow leaves and roots. The vegetative stage can last anywhere from a few weeks to several months, depending on the strain of cannabis and the growing conditions.

Once the plant has reached its full size, it will enter the flowering stage. This is when the plant starts to produce buds. The flowering stage typically lasts 8-12 weeks, although some strains can take longer to flower.

The final stage of the cannabis growth cycle is harvest. This is when the buds are cut from the plant and dried. Depending on the strain, harvest usually occurs 8-12 weeks after flowering has begun.

Vegetative Stage

The vegetative stage is when the plant is focused on growing leaves and stems. The amount of time the cannabis plant spends in the vegetative stage will depend on the size you want your final plant to be. If you are growing a small plant for personal use, it can spend as little as two weeks in this stage. However, if you are growing a large plant for commercial purposes, it could take several months. During this stage, it is important to give your plant plenty of light (preferably 18 hours a day) and nutrients so it can grow strong and healthy.

Flowering Stage

The flowering stage is the final stage of cannabis growth before harvest. During this stage, the plant’s energy and focus is directed towards developing its buds (the flowers that contain the plant’s precious cannabinoids).

This stage usually lasts between 6-8 weeks for most cannabis strains, although some indica strains can flower in as little as 8 weeks, and sativas can take up to 12 weeks.

You will know that your plant has entered the flowering stage when you see the appearance of Pistils on the buds. Pistils are thin, white, hair-like structures that protrude from the flowers (buds). As the plant matures, these pistils will darken and curl inwards, eventually forming the signature “globes” of THC-rich resin that we all know and love.

Factors That Affect the Cannabis Growth Cycle

The amount of time it takes for cannabis to grow can vary depending on a few different factors. These factors include the type of cannabis, the growing conditions, and the grower’s experience. Let’s take a closer look at each of these factors.

The Plant’s Genetics

The first factor that affects how long it takes for a cannabis plant to fully mature is the genetics of the plant. Just like with people, some cannabis plants will mature faster than others. The age of the plant also plays a role in how quickly it will mature. Young plants typically take longer to mature than older plants.

The Size of the Plant

The size of the plant is one of the primary factors that affect the cannabis growth cycle. Larger plants will take longer to grow, while smaller plants will mature more quickly. In general, it takes between six and eight weeks for a cannabis plant to reach full maturity. However, this can vary depending on the specific strain of cannabis, as well as the growing conditions.

In some cases, it may be necessary to bred plants in order to produce larger specimens. This is often done with indica strains, which tend to be shorter and bushier than sativas. By breeding two indica strains together, it is possible to produce a plant that is significantly larger than either of its parent strains. However, this process can add a considerable amount of time to the overall grow cycle.

The Quality of the Soil

The quality of the soil where cannabis is grown will affect the growth and development of the plant. Poor-quality soil will result in a weaker plant with smaller buds. The ideal soil for growing cannabis is loose and rich in organic matter. Cannabis plants also need access to a good amount of nitrogen, phosphorus, and potassium to grow healthy and reach their potential.

The Amount of Sunlight

The amount of sunlight is probably the most important factor affecting the cannabis growth cycle. The more sunlight the plant gets, the faster it will grow. Plants grown outdoors in full sun will usually mature faster than those grown indoors under artificial lights. However, too much sun can be damaging to the plant, leading to stunted growth or even death.

Ideal growing conditions for cannabis vary depending on the strain, but in general, plants need at least six hours of direct sunlight per day to thrive. If you are growing cannabis outdoors, choose a spot that gets plenty of sun throughout the day. If you are growing indoors, make sure your grow lights mimic natural sunlight as closely as possible.

The Amount of Water

The amount of water your cannabis plants receive can have a big effect on their growth cycle. Too little water will cause your plants to wilt and may even kill them, while too much water can lead to root rot. Water your plants regularly, but be sure to check the soil first to make sure it’s dry before watering again.

Tips for Growing Cannabis

Growing your own cannabis can be a fun and rewarding experience, but it takes time and patience. Cannabis plants can take anywhere from 6 to 16 weeks to fully mature, depending on the strain. In this article, we’ll give you some tips on how to grow your own cannabis plants.

Start with Healthy Seeds

If you want your cannabis plants to have the best chance of growing into healthy adults, you need to start with quality seeds. You can buy seeds from a reputable seller, or you can get them from a friend who grows cannabis. Either way, make sure you know the source of your seeds and that they are of good quality.

Once you have your seeds, store them in a cool, dark place until you are ready to plant them. When you are ready to plant, fill some small pots with soil and plant two or three seeds in each pot. Once the seeds have germinated and begun to grow, you can thin out the weaker plants and focus on growing the strongest one.

Plant in Good Soil

Cannabis is a easy plant to grow. It can be grown in soil, coco, or hydroponically. Cannabis plants like to eat. Give them quality nutrients and they will reward you with healthy growth and big yields. We recommend using Fox Farms Ocean Forest potting soil when growing in soil. This is a premium quality potting mix that contains earthworm castings, bat guano, oyster shell, and forest humus. You can find this at your local grow store or online.

Give the Plants Plenty of Sunlight

Cannabis plants need a lot of sunlight to grow properly. If you’re growing cannabis indoors, you’ll need to provide your plants with at least 18 hours of light per day. If you’re growing cannabis outdoors, make sure your plants are getting at least 6 hours of direct sunlight per day.

Water Regularly

Cannabis plants need a lot of water, especially during their vegetative stage when they are growing new leaves and roots. Be sure to water your plants regularly, giving them enough water to soaked the soil but not so much that it becomes waterlogged. If you are growing cannabis in pots, be sure to check the bottom of the pot for drainage holes to ensure that your plant isn’t sitting in water.

Don’t Overwater

One of the most common mistakes new growers make is overwatering their plants. Cannabis plants are native to areas with low rainfall, so they don’t need a lot of water to thrive. Overwatering can lead to a number of problems, including root rot, nutrient deficiencies, and mold growth.

To avoid overwatering, it’s important to check the soil before watering your plants. If the top inch or two of soil is dry, it’s time to water. Be sure to water slowly and deeply, so that the roots have a chance to absorb the water.

Scroll to Top