Grow Microgreens on a Windowsill in Sardine Tins

Sardine tins are shallow, easy to punch drainage holes in, and the same footprint as a classic cress punnet. Coir disc in, seeds sown thick, tins stacked to weigh the seeds down while they germinate — harvestable greens in about a week.

grow food indoors, sprouts on the kitchen counter, grow greens in an apartment, indoor gardening for beginners

beginner Added Jul 25, 2026

The Problem

Growing food usually gets filed under "needs a garden." Microgreens don't — they're the edible seedlings of familiar plants, they grow in almost anything, and they're ready in about a week. The only setup question: what's a shallow container with drainage that fits a windowsill?

The Technique

  1. Punch a few drainage holes in the bottom of empty sardine tins — the thin metal makes this easy, and the tin is the same size as a classic punnet of cress.
  2. Rehydrate a coconut coir disc and set it in the tin as the growing medium.
  3. Sow seeds thickly, straight onto the surface — broccoli, pak choi, kale, radish, and cress all work — and give them a spray of water.
  4. Stack the tins on top of each other while the seeds germinate. The weight pressing down on the seeds pushes stronger, more even growth.
  5. After a couple of days, unstack and line the tins up on the windowsill. Keep them moist.
  6. Harvest with scissors as you want them — as garnish snips or by cutting a whole tray into a salad.
Pro tip: Any shallow food container works if tinned fish isn't in your pantry — sunflower shoots in a tapas dish, lentil greens in a mushroom tray, radish in a cream-cheese tub. Drainage holes are the only requirement.

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