Autoflower Timeline vs Photoperiod Timeline: Complete Grower's Comparison

Autoflower Timeline: Week by Week

Week 1: Germination & Seedling

Germinate your seed (paper towel or direct soil method). Once planted, the seedling emerges in 2–5 days with its first pair of round cotyledon leaves. Light should be gentle — LED at 50% or raised 24+ inches. Water sparingly — just mist the surface or give a shot glass of water around the stem. The root system is tiny and overwatering is the #1 seedling killer.

Week 2: First True Leaves

The first set of serrated cannabis leaves (true leaves) appears. The plant is still small — only 2–3 inches tall — but the roots are expanding below the surface. Continue light watering. This is when most growers start a very mild nutrient solution (¼ strength) if using coco or an inert medium. Soil growers: the soil has enough nutrients for now.

Week 3: Vegetative Growth Begins

Growth accelerates noticeably. New leaf sets appear every day or two. The plant is establishing its structure — you can start gentle LST (low stress training) now if you plan to train. Start watering in a wider circle around the plant to encourage roots to spread outward.

Week 4: Pre-Flower & Transition

Most autoflowers begin showing pre-flowers (small white hairs at branch junctions). This is the plant transitioning from vegetative growth to flowering. Growth rate peaks — this is the fastest growth period. If you're going to do any LST, it should be done or nearly done by now. Increase nutrients slightly (transition to bloom nutrients if using separate veg/bloom formulas).

Weeks 5–6: Early Flower

Buds are visibly forming at every branch junction and especially at the main cola. White pistil hairs are everywhere. The plant may stretch 50–100% taller during this phase. Lower humidity to 50–55% to prevent mold. Increase bloom nutrients. The smell starts becoming noticeable — make sure your carbon filter is running.

Weeks 7–8: Mid Flower — Bud Development

Buds are stacking weight rapidly. Trichomes (the crystal-like resin glands) are visible on the buds and surrounding sugar leaves. The smell is strong. Continue bloom nutrients at full strength. Watch for any signs of nutrient deficiency (yellowing lower leaves is normal in late flower as the plant redirects energy to buds). Maintain humidity at 45–50%.

Weeks 9–10: Late Flower — Ripening

Buds are dense and heavy. Pistils start changing from white to orange/amber. Trichomes begin shifting from clear to milky white. Some growers start flushing (watering with plain water) in the final week or two. Monitor trichomes with a loupe or digital microscope. Harvest when trichomes are mostly milky (70–80%) with some amber (10–20%) for peak effects.

Weeks 10–12: Harvest Window

Most autoflowers are ready between days 70–85. Fast strains may be done by day 63; slower sativa-leaning autos may go to day 90+. Trust trichome color over pistil color or day count. After harvest: dry in a dark room at 60°F and 60% humidity for 7–14 days, then cure in glass jars for 2+ weeks.

Photoperiod Timeline: Week by Week

Weeks 1–2: Seedling (Same as Autos)

Identical to autoflower seedling stage. Gentle light, minimal water, warm temps. Run lights at 18/6 (18 hours on, 6 hours off).

Weeks 3–8: Vegetative Growth

This is where photoperiods diverge from autos — you control how long veg lasts. Most indoor growers veg for 4–8 weeks, but you can go longer for bigger plants. During veg, the plant is building structure (stems, branches, leaves) that will support buds during flower. This is the time for training: topping, LST, SCROG setup, mainlining, or any technique you want to use. Ramp up nitrogen-rich nutrients.

The Flip: Switching to 12/12

When your plant reaches about 50–60% of your target final height, switch lights to 12/12 (12 hours on, 12 off). The plant will stretch 50–100% taller during the first 2–3 weeks of flower. Absolute darkness during the 12-hour dark period is critical — any light leaks can cause stress or hermaphroditism.

Weeks 1–3 of Flower: Stretch & Transition

The plant stretches rapidly and begins forming pre-flowers. Switch to bloom nutrients. Defoliate if needed to open up the canopy. The transformation from green bush to flowering plant happens quickly.

Weeks 4–6 of Flower: Bud Formation

Similar to auto weeks 5–7. Buds forming, pistils visible, trichomes developing. Maintain steady environment. This is peak nutrient demand.

Weeks 7–10+ of Flower: Ripening & Harvest

Similar to late auto flower. Monitor trichomes. Some strains need 10–12 weeks of flower (especially sativas like Amnesia Haze). Harvest when trichomes are at your preferred ratio. Dry and cure the same as autos.

After Harvest: Drying & Curing

Drying: Hang whole branches or individual buds in a dark room at 60°F, 60% humidity for 7–14 days. Stems should snap (not bend) when dry. Don't rush this — slow drying preserves terpenes.

Curing: Trim buds and place in glass mason jars, filled 75% full. Open jars ("burp") for 15 minutes daily for the first 2 weeks, then every few days for another 2–4 weeks. Proper curing improves flavor, smoothness, and potency. Minimum 2-week cure; 4–8 weeks is ideal.

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