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very easy · windowsill
Almost impossible to fail with, and they regrow after cutting — one sowing can crop several times.
Allium fistulosum · Amaryllidaceae
They take up almost no room, tolerate a lot of neglect, and the regrowth trick makes the point about home growing better than almost anything else.
Day 0
From seed: sow 1cm deep, 2cm apart. From shop-bought: keep the bottom 3cm with roots attached and plant it root-down in compost.
Week 1-2
Keep the compost moist. Regrown roots will push new green shoots within a few days; seed takes one to two weeks.
Week 3
Give each plant about 2cm of space so the stems can thicken.
Week 8 onward
Snip the green tops about 3cm above the compost and leave the roots in place. They regrow two or three more times before needing replacing.
Cause: Sown too densely, or too little light.
Fix: Thin to about 2cm apart and move somewhere brighter.
Cause: Compost drying out between waterings.
Fix: Water more often and less heavily. Small pots dry out surprisingly quickly.
Carrot, Lettuce
Before you eat anything you grow: be certain of the identification. This guide describes spring onions specifically — it is not a way to confirm that an unknown plant is safe. Never eat a plant on the strength of an app alone.