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How to grow nasturtiums

Takes light frost · Nasturtium family

When to sow and plant

  • Start indoors 8–22 March
  • Sow outdoors 19 April – 3 May

Based on: average for Germany, last frost 19 April, safe from 6 May

Planting calendar for your area
Where the dates come from

The weeks come from our sources; the dates use the average frost in Germany. Enter a German postcode to get dates for your area.

  • Start indoors: 4–6 weeks before the last frost (UW–Madison Extension Horticulture: Nasturtium, Tropaeolum majus)
  • Sow outdoors: 0–2 weeks after the last frost (UW–Madison Extension Horticulture: Nasturtium, Tropaeolum majus)

Good and bad neighbours

Gardeners’ lore, not proven · 2

Crop rotation

Our sources give no separate break for this family.

  • The same species should go back to the same spot after a break of 3 years at the earliest.
  • Example: grown here in 2026, again from 2030.

At a glance

Family
Nasturtium family (Tropaeolaceae)
Frost
Half-hardy, tolerates light frost
Spacing (row × plant)
– × 25 cm (– × 10 in)
Life cycle
Annual

Questions and answers

When can I sow nasturtiums?

Sow outdoors, average for Germany: 19 April – 3 May. Enter a German postcode above for your area, or your own frost date in the planting calendar.

How far apart should I plant nasturtiums?

– × 25 cm (– × 10 in) (row × plant), according to UW–Madison Extension Horticulture: Nasturtium, Tropaeolum majus.

What grows well next to nasturtiums?

White cabbage, Red cabbage, Savoy cabbage, Cauliflower, Brussels sprouts, Broccoli: Gardeners’ lore, not proven (D) and Pole bean: Gardeners’ lore, not proven (D).

How long a break do nasturtiums need in the same bed?

Our sources give no separate break for this family. The same species should go back to the same spot after a break of 3 years at the earliest.

Sources

Show 8 sources
  1. Illinois Extension, Flowers: Nasturtium (Tropaeolum majus)
  2. Illinois Extension, Herb Gardening: Nasturtium
  3. UW–Madison Extension Horticulture: Nasturtium, Tropaeolum majus
  4. Landwirtschaftskammer Schleswig-Holstein: Fruchtfolge im Garten (Gartenmerkblatt, 2020)
  5. GBIF Backbone Taxonomy (über die GBIF-API, species/match)
  6. Oregon State University Extension: Herbs and Flowers in the Vegetable Garden (o. J.)
  7. Utah State University Extension (Mohr, Trundle, Hagevik): Creating Sustainable School and Home Gardens – Companion Planting (Juli 2025)
  8. BUND: Mischkultur – Gute und schlechte Nachbarn (August 2026)

Retrieved on 23 October 2026. Facts in our own words, one source per value.