Guide · Beginner

A home cannabis grow typically takes between three and six months, from the day a seed cracks to the day its buds are cured and ready to smoke. Three things set the pace: genetics, environment, and how long the plant spends in its vegetative stage.

Timeline at a glance

The totals include drying and curing, which are often left out of timeline estimates even though they determine how the finished flower tastes and smokes.

Germination

Germination is the point at which the seed cracks open and sends out its first root. Depending on seed quality and method, this takes anywhere from a day or two to a full week. The most common approach is to place the seed between two damp paper towels in a warm, dark location and check it twice a day. Seeds that show no sign of life after a week are usually dead.

Seedling stage

Once the taproot is established and the first pair of serrated leaves appears, the plant has entered the seedling stage. This period lasts one to two weeks. Seedlings are fragile and want humidity, gentle light, and very little water. Overwatering is commonly cited as the leading cause of seedling loss for new growers.

Vegetative stage

The vegetative stage is the plant’s growth phase. It builds stems, branches, and fan leaves, but no flowers. This is the stage where the plant’s final size and shape are most easily controlled.

Autoflowers vegetate automatically for roughly two to four weeks before beginning to flower, regardless of the light schedule.

Photoperiod plants vegetate for as long as they are kept on a long-day light cycle, typically 18 hours of light and 6 hours of dark. Four to eight weeks is the common range for home cultivation. Shorter veg times produce smaller plants and faster harvests; longer veg times produce larger plants and bigger yields.

A technique called Sea of Green (SOG) compresses this stage to two or three weeks by flowering a larger number of small plants rather than a few large ones.

Flowering stage

Buds form during flowering. For autoflowers, the stage begins automatically and lasts six to eight weeks. For photoperiod plants, it begins when the light cycle is switched to 12 hours on and 12 hours off, and lasts eight to eleven weeks depending on the cultivar.

Strains bred specifically for speed, often marketed as “fast,” “early,” or “express,” finish on the shorter end of these ranges. Phenotypes historically labeled indica-dominant also tend to finish faster than sativa-leaning ones, although these categories are increasingly disputed by breeders and botanists.

Drying and curing

A plant is not finished at harvest. Once cut, the buds need to dry slowly in a cool, dark space with moderate humidity. Drying takes five to ten days. After drying, the buds are placed in sealed glass jars and cured for at least two weeks, and ideally four or more. Curing transforms harsh, grassy-smelling buds into smooth, aromatic flower. It is also the step most often cut short.

In practice

A fast autoflower grown indoors, with drying and a minimal two-week cure, can reach smokeable flower in roughly three months. A photoperiod plant given a long vegetative phase, a full flower, and a proper cure reaches the same point closer to six months from seed.

The three things introduced at the top of the guide determine where a particular grow lands between those extremes:

1. Genetics. A strain bred for speed finishes weeks earlier than a standard cultivar.
2. Environment. Indoor growing removes seasonal constraints and lets the full cycle be scheduled rather than dictated by the weather.
3. Vegetative length. Every day cut from the vegetative stage is a day cut from the total grow. The tradeoff is yield: a shorter veg produces a smaller plant.

Speed, yield, and quality pull against each other. The right timeline depends on which of the three a given grow is chasing.