Nasturtium - Key Growing Information
DAYS TO GERMINATION: 7-14 days at 60-65°F (16-18°C).
SOWING: Direct seed (recommended): Sow 2 weeks before last frost, 8-12" apart, 1/2-1" deep. Cover seed as they require darkness to germinate. Thin when seedlings have the first true leaves. Transplant: Sow 3-4 weeks before the last frost. Plant 2 seeds 1/2-1" deep in individual cells or pots. Cover seeds as they require darkness to germinate. Thin to one plant per cell or pot. Harden off and transplant outside after the danger of frost has passed. Trellising is needed for climbing varieties and they will need assistance to climb.
LIGHT PREFERENCE: Sun/Part Shade.
SOIL REQUIREMENTS: Well-drained, but not especially rich soil. High nitrogen levels promote more foliage than flower production.
PLANT SPACING: 8-12". Thin to 3-5 plants in hanging baskets or 10" containers.
HARDINESS ZONES: Annual.
HARVEST: Edible flowers: Harvest when the flowers are fully open.Edible leaves: Harvest at any time.
USES: Bedding plant. Excellent in containers and hanging baskets. Edible.
SCIENTIFIC NAME: Tropaeolum spp.
ALTERNATE NAMES: Garden nasturtium, Indian cress