Here’s how to grow this beautiful annual with its trailing vines and colorful, edible blossoms in pots and garden beds.
Sunlight: Full sun to partial shade
Maturity: 55-70 days from seed to flower
Height: 12 to 18 inches
Spacing: 8 to 12 inches apart in all directions
A quick and easy-to-grow annual that reseeds itself freely. Home gardeners are growing nasturtium (Tropaeolum) for their colorful flowers and attractive foliage. Great for cool-weather climates, beautiful blossoms can also brighten up salads and pastas… they’re edible!
Fragrant plants with their bright green foliage and orange, red and yellow flowers are perfect for ground covers, windowboxes, walls or containers. Nasturtiums are a good flower to plant with children because they grow so rapidly and their large seeds are easily handled by little fingers. Hardy annual, 12-18 inches tall.
Nasturtiums prefer full sun and moist soil, but will tolerate some shade. In hot climates, plant in partial shade and work a shovelful or two of organic matter, such as compost or well-aged manure, into the ground. This helps condition the soil, which improves drainage and will keep roots cool (watch 6 Tips for Growing Great Flowers – video).
Tired of the same old flowers? Heirloom flower seeds — the ones that Grandma used to grow — add charm to your garden while stirring memories with their abundant blossoms and arousing scents. Best of all, we ship them FREE!
How to Plant:
Sow outdoors one week after last frost, 1/4 inch beneath the surface of the soil. Nasturtium seeds germinate in 7-12 days and grow quickly. Plants do NOT require fertilizer during the gardening season. In fact, nasturtiums seem to thrive on lean soil and neglect. Provide support for some of the taller climbing varieties and pinch off the spent blooms to extend the flowering season.
Insects and Disease:
Aphids, slugs, whiteflies and flea beetles are a few of the common garden pests found on nasturtiums. Watch closely and apply insecticidal soap mixed with pyrethrin or diatomaceous earth when necessary.
Seed Saving Instructions:
Nasturtiums will cross-pollinate. Gardeners should only grow one variety at a time to save pure seed or isolate varieties by 1/2 mile. Seeds are formed in pods beneath the blossoms containing around 2-3 large seeds. Pods do have a tendency to burst, so placing an old sheet or newspaper around the plants may be necessary. Picking the seedpods slightly premature is also an option. Learn more about Saving Heirloom Flower Seeds here.