Growth Chart

Where your plant should be right now.

About 16–18 weeks from sprout. Veg length is your choice; flowering starts when you switch to 12/12 (shown here at week 8).

W0W2W4W6W8W10W12W14W16W18
  1. GerminationWeeks 0–1

    Taproot, then two round cotyledons.

    Height
    0–3 cm
    Light
    18/6, very low (100–200 PPFD)
    Feed
    None
    Climate
    24–26°C, 70–80% RH
  2. SeedlingWeeks 1–3

    2–4 sets of serrated true leaves, short stem.

    Height
    3–10 cm
    Light
    18/6, 200–400 PPFD
    Feed
    ¼ strength or none · EC 0.4–0.8
    Climate
    24–26°C, 65–75% RH
  3. VegetativeWeeks 3–8

    New node every 2–4 days, side branches, wide fan leaves. Train now.

    Height
    10–45 cm
    Light
    18/6, 400–600 PPFD
    Feed
    Grow formula · EC 1.0–1.6
    Climate
    24–28°C, 55–65% RH
  4. Transition & stretchWeeks 8–11

    White pistils at nodes, rapid stretch, first bud sites.

    Height
    45–90 cm (can double)
    Light
    12/12, 600–800 PPFD
    Feed
    Switch to bloom · EC 1.4–1.8
    Climate
    23–27°C, 45–55% RH
  5. Bulk flowerWeeks 11–15

    Buds swell and stack, frosty trichomes, strong smell.

    Height
    Stops growing taller
    Light
    12/12, 700–900 PPFD
    Feed
    Peak bloom · EC 1.6–2.2
    Climate
    22–26°C, 40–50% RH
  6. Ripening & harvestWeeks 15–18

    Pistils darken and curl in, trichomes cloudy → some amber, fade.

    Height
    Final
    Light
    12/12
    Feed
    Taper / optional plain water
    Climate
    20–25°C, 40–50% RH

Typical ranges — strain genetics, pot size and light change real timing and height by several weeks.