Growing Nasturtiums in Zone 10A

Nasturtiums are edible, pest-trapping flowers with peppery leaves and vibrant blooms.

Zone 10A has a very long growing season with mild winters. Many crops can be grown nearly year-round with successive plantings.

Top Growing Tips

• Direct sow after frost — they don’t transplant well
• Use as trap crops for aphids — they attract pests away from vegetables
• Flowers, leaves, and seeds are all edible (peppery, like watercress)
• Too-rich soil produces lots of leaves but fewer flowers
• Trailing varieties are beautiful in hanging baskets and window boxes

Companion Planting

Good companions: tomatoes, cucumbers, cabbage, beans — excellent trap crop

Avoid planting near: none — nasturtiums are beneficial companions

Harvest Timeline

Flowering begins 50-60 days from seed; use flowers and leaves fresh

About Zone 10A

USDA Hardiness Zone 10A has an average last spring frost around Feb 1 and first fall frost around Dec 20. All planting dates above are calculated from these frost dates. Your specific location may vary — check with your local extension office for the most accurate dates.