🌱 How Long Does It Take to Grow Cannabis? A Timeline From Clone to Harvest

One of the most common questions new growers ask is how long it actually takes to grow cannabis from start to finish.

The answer depends largely on how you start your grow. Plants grown from seed must go through an early seedling stage before real vegetative growth begins, while clones skip that stage entirely.

Because of this, growers who start with clones are typically about two weeks closer to harvest compared to starting from seed.

While every grow is slightly different, most indoor cannabis plants follow a predictable development timeline.

This guide breaks down the typical stages of cannabis growth and explains how long each stage usually takes.

🧠 The Main Growth Stages of Cannabis

Cannabis plants develop through several key stages.

These include:

• Root establishment

• Vegetative growth

• Flower development

• Harvest and post-harvest processing

Each stage contributes to overall plant health, canopy structure, and final flower quality.

Understanding how long each stage lasts helps growers plan their cultivation schedule more effectively.

🌱 Root Establishment (Week 1)

When starting with clones, the first stage involves allowing the plant to settle into its new growing environment while roots expand into the medium.

During this stage:

• Roots establish themselves in the soil or coco

• New vegetative growth begins

• Plants adapt to the grow environment

Because clones come from mature plant tissue, they skip the seedling stage entirely.

Seed-grown plants typically spend 10–14 days developing as seedlings before they begin vigorous vegetative growth.

Clones bypass this stage, which immediately puts growers about two weeks closer to harvest.

🌿 Vegetative Growth (3–5 Weeks)

Once roots establish, cannabis plants enter vegetative growth.

During veg, plants focus on building structure and foliage.

Growers typically use this stage to:

• Shape the canopy

• Train branches

• Develop plant structure

• Increase plant size

Many indoor growers veg plants for 3–5 weeks before switching to flowering.

The exact length depends on grow space and canopy goals.

If you want a deeper walkthrough of the entire cultivation process from early growth to harvest, see the Clone to Cola Grow Guide

🌼 Early Flower Transition (Weeks 1–2 of Flower)

After switching to a 12/12 light cycle, plants begin transitioning into flowering.

During this stage:

• Plants stretch vertically

• Flower sites begin forming

• Pistils appear on female plants

Most stretch occurs during the first two weeks of flowering as the plant redirects its energy toward reproduction.

Once stretch slows, bud development begins accelerating.

🌸 Flower Development (Weeks 3–8+)

After the transition period, cannabis plants focus almost entirely on flower production.

During this stage:

• Buds expand and stack

• Resin production increases

• Terpenes begin developing

• Trichomes mature

Most indoor cultivars finish flowering within 8 to 9 weeks, although some genetics may take slightly longer depending on their lineage.

Environmental stability during this stage is critical for maximizing flower quality.

🌾 Harvest, Drying, and Curing

Once flowers reach maturity, the plant is harvested and the post-harvest process begins.

This includes:

• Harvesting the plant

• Drying the flowers slowly

• Curing to improve aroma and smoothness

Drying typically takes 7–14 days, while curing can continue for several weeks to fully develop terpene expression.

Proper drying and curing dramatically improve the quality of the finished flower.

⏱ A Typical Clone-to-Harvest Timeline

When starting with clones, a typical indoor cannabis timeline looks like this:

• Root establishment: ~1 week

• Vegetative growth: 3–5 weeks

• Flowering: 8–9 weeks

• Drying: 1–2 weeks

• Curing: 2–4 weeks

This means many indoor growers can complete a full cycle in approximately 11–13 weeks from clone to finished flower.

Starting from seed usually adds about two extra weeks due to the seedling stage and sex identification process.

Instead of waiting for seeds to mature and reveal plant sex, growers can begin with plants already ready to grow. Explore the Clone Collection to start your garden with cultivars selected for reliable indoor performance.

Clones provide a faster path to harvest while also delivering genetic consistency.

🌱 Final Thoughts

Cannabis cultivation requires patience, but understanding the growth timeline helps growers plan their garden more effectively.

Plants move through predictable stages as they develop from early growth through flowering and harvest.

Starting with clones removes the seedling stage and eliminates the need to identify male plants, which allows growers to reach harvest roughly two weeks sooner.

Healthy genetics, stable environments, and consistent cultivation practices lead to smoother grow cycles and better harvest results.

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For more guides covering plant training, nutrient systems, and troubleshooting cultivation issues, visit the Grow Guide blog hub