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Growing Tomatoes: From Sowing to a Bountiful Harvest

8 min read · Season: Summer · June 9, 2026

Growing Tomatoes: From Sowing to a Bountiful Harvest

Tomatoes – King of the Vegetable Garden

Hardly any vegetable delights gardeners as much as the tomato. The variety is enormous: from small cocktail tomatoes to large beefsteak tomatoes, in yellow, red, purple, or striped.

Sowing & Starting Indoors (February–March)

Tomatoes need an early start, since they have long ripening periods.

  1. Sow in seed-starting mix, about 1 cm deep, at 20–25 °C (a heat mat helps).
  2. Germination time: 7–14 days. Once seedlings appear, move them somewhere brighter.
  3. Pricking out: once 2 true leaves are present, move into individual pots (9 cm Ø).
  4. Hardening off: from April, short spells outside – first in shade, then in more sun.

Planting Out (from mid-May)

Only after the Ice Saints (May 15) into the open ground – tomatoes are not frost-hardy.

  • Spacing: 60–80 cm between plants, 1 m between rows.
  • Plant deep: bury up to the lowest leaves – extra roots form along the stem.
  • Staking: set up stakes or strings right at planting time.

Care

  • Removing side shoots: regularly remove side shoots in the leaf axils (except with bush tomatoes). Boosts yield.
  • Watering: evenly and at the root – wet leaves promote disease. Water in the morning.
  • Fertilizing: every 2 weeks with tomato fertilizer or nettle liquid manure.
  • Topping: at the end of July, cut off the shoot above the 4th–6th flower truss – so the existing fruit ripens better.

Greenhouse vs. Outdoors

Greenhouse Outdoors
Advantage Earlier harvest, no rain No cost for covering
Disadvantage Watering matters more Higher blight risk
Tip Don't forget to ventilate Rain protection recommended

Harvest & Storage

Store tomatoes at room temperature – never in the refrigerator! Cold destroys the flavor. Only put very overripe tomatoes in the fridge, ones that would otherwise spoil.

This article comes from the Ernterei app. The journal for people who make things themselves: garden, harvest, pantry, recipes and over 140 how-to articles – free for iPhone and Android.