Spring/Summer/Fall bloom
Frost tender
Sow seeds in spring once all danger of frost is over in full sun (or part shade in hot climates). Nasturtiums need no added fertilizer in most soils. Poke seeds into well-worked soil about 1 inch deep and 3 to 4 inches apart. Press soil firmly over the seeds and keep moist. When seedlings are large enough to handle, thin to stand 10 inches apart, or 6 to 8 inches apart if training seedlings up vertical supports.
Sow 2 seeds each in individual 4-inch pots of well-drained seed starting mix 3 weeks before last expected frost date. Cover 1 inch deep. Provide a strong light source. When seedlings have several sets of leaves, pinch out the weaker seedling leaving 1 seedling per pot. When weather is evenly in the 50°F (10°C) range, gradually acclimate to outdoor conditions. Transplant as above in full sun.
Climbing nasturtiums are easy to grow in any well-drained soil. You’ll need to train young plants onto their supports with loose ties, then they’ll climb easily and bloom non-stop. Do not let plants dry out during blooming season. If aphids become a problem, wash them off with a strong spray of water or spray with non-toxic Safer’s Soap solution. Phoenix’s bright confetti like blossoms are true summer beacons for hungry hummingbirds.
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