Category: Seed Starting

Why seedlings suddenly collapse at the soil line, which pathogens cause damping-off, and the extension-backed steps that prevent it.

Seedlings need 14–16 hours of light and a dark night. Here is how light intensity changes the hours, with crop targets and a timer schedule.

Fluorescent tubes 2–4 inches, LEDs higher: extension-backed grow light distance for seedlings, the PPFD behind it, and how to adjust the height.

Why seedlings stretch, how close the light should be, and 7 steps to rescue leggy seedlings, from brushing to burying tomato stems.