Clone Growth Week by Week: From Roots to Harvest
Quick answer: A cannabis clone roots in roughly its first 1-2 weeks (high humidity, gentle light), then moves into vegetative growth around weeks 2-4 as it establishes and is transplanted, and can be flipped to flowering whenever it is big enough. From clone to harvest typically takes about 3-4 months total, depending on how long you veg and the strain’s flowering time. Each week has its own priorities, from humidity and rooting to light, feeding and training.
A clone is a cutting taken from a mother plant, genetically identical to it, and watching it develop week by week helps you give it exactly what it needs at each stage. Unlike seeds, clones skip germination and start as a rooted (or rooting) cutting, so the journey runs from root formation, through vegetative growth, to flowering and harvest, each phase with distinct lighting, humidity, feeding and care.
Recommended Strains
Durban Poison
|
THC | 15% - 25% (High) |
|
Type | Feminized |
|
Yield | High |
|
Phenotype | 10% Indica / 90% Sativa |
Durban Poison Autoflower
|
|
THC | 21% - 25% (High) |
|
|
Type | Autoflowering |
|
|
Yield | Low |
|
|
Phenotype | 20% Indica / 80% Sativa |
This guide maps out clone growth week by week, from the fragile rooting period to a harvest-ready plant, with a timeline table and what to focus on at each point. Timings vary with strain, environment and how long you choose to vegetate, so treat the weeks as stages rather than fixed dates, and let the plant’s development guide your decisions.
| Week | Clone stage | Focus |
|---|---|---|
| Week 1 | Rooting | High humidity, gentle light; roots form |
| Week 2 | Establishment | Roots strengthen; first new growth |
| Weeks 3-4 | Early vegetative | Transplant; ramp light and feeding |
| Weeks 5+ | Full veg, then flower | Grow out, then flip to flowering as desired |
Clone Growth Week by Week
In week 1, the clone’s only job is to root. It has no real root system yet, so keep humidity very high (a propagator/dome), light gentle and low, and the medium lightly moist, feeding little or nothing. By the end of week 1 into week 2, you should see new roots and the first signs of fresh growth, the clone is establishing. Now you can lower humidity gradually, raise light intensity, and begin light feeding.
Through weeks 2-4 the clone enters early vegetative growth: transplant it into its final pot once roots are established, step up light and nutrients, and start any training. From there it grows like any veg plant until you flip it to flowering. For the right light intensity on fragile young clones, see our guide on PPFD for clones.
Promos & Deals
Watering and Care Each Week
Watering changes as the clone develops. In the rooting week, go easy: the cutting takes up moisture through its leaves and stem (hence the humidity dome) more than through roots, so keep the medium barely moist, not wet, and mist lightly, overwatering at this stage causes rot. As roots form, you can water a little more, letting the medium begin a gentle wet-then-dry cycle.
Once in veg (weeks 2-4 onward), water like a normal young plant: thoroughly when the top of the medium dries, encouraging roots to reach down. The biggest early mistake is drowning an unrooted clone, so err on the dry side at first, then increase as the root system grows. Consistent, stage-appropriate watering is what carries a clone smoothly from cutting to vigorous plant.
How Long From Clone to Harvest?
From clone to harvest usually takes around three to four months, though it varies. Budget roughly 1-2 weeks to root, a few weeks of vegetative growth (as long or short as you want, this is the flexible part), and then the strain’s flowering time, commonly 8-10 weeks for photoperiod plants. A short veg gives a faster, smaller harvest; a longer veg gives bigger plants and yields.
Because clones skip germination and start from an established genetic copy, they can sometimes reach harvest a little faster than seeds and give completely uniform plants. The main variables are your veg length, the strain’s flowering time, and your environment. Plan your veg period around the final size you want, then flip to 12/12 light (indoors) to begin flowering when the plant is ready.
Common Clone Problems and Fixes
A few issues crop up as clones develop. The most common early problem is rot or damping-off from overwatering during the rooting week, keep the medium barely moist and humidity high but with some airflow, not soaking wet. Wilting, drooping clones in week 1 are usually normal (they have no roots yet) and perk up as roots form, but persistent limpness with wet medium points to rot.
Later, yellowing or stalled clones often mean they are ready for more light and a little feeding as they root and enter veg, or that they need transplanting into a bigger pot. Leggy, stretchy clones reaching for light need the light lowered or intensified. The key is to match care to the stage: gentle and humid while rooting, then gradually more light, water and nutrients as the clone establishes. Most problems trace back to too much water too early.
FAQs
How long does it take for a clone to grow?
From clone to harvest usually takes about three to four months: roughly 1-2 weeks to root, a few flexible weeks of vegetative growth, then the strain’s flowering time (commonly 8-10 weeks). A shorter veg means a faster, smaller harvest; a longer veg gives bigger plants. Strain and environment affect the exact timeline.
What are the stages of clone growth?
Clones go through rooting (week 1-2, high humidity, gentle light), establishment and early vegetative growth (weeks 2-4, transplant, more light and feeding), full vegetative growth, and finally flowering and harvest once flipped. Each stage needs tailored humidity, light, water and nutrients. Treat the weeks as stages rather than fixed dates.
How do you care for a clone in week 1?
In week 1 the clone is rooting, so keep humidity very high (a propagator dome), light gentle and low, and the medium barely moist, not wet. Feed little or nothing. The cutting takes up moisture through its leaves, so mist lightly and avoid overwatering, which causes rot. Roots usually appear by late week 1 into week 2.
Why is my clone wilting or not growing?
Early wilting is often normal, clones have no roots yet and perk up once roots form, but limp clones in constantly wet medium suggest rot from overwatering. Stalled or yellowing clones usually need more light and light feeding as they root, or transplanting. Keep rooting clones humid but not soaking, then ramp care as they establish.
