How to prune nasturtium

Deadhead and trim throughout the growing season as needed. Pinch or cut spent flowers at the stem, removing the seed pod behind the flower if you want to prevent self-seeding. Trim trailing stems back to a healthy leaf node to control spread. No hard pruning is needed or beneficial.

Deadhead every 1–2 weeks during bloom; trim sprawling stems as needed. Nasturtiums need light pruning only. Deadheading spent blooms extends flowering and prevents excessive self-seeding, though many gardeners allow some seeds to collect for next year. Trim back sprawling stems if they outgrow their space. In hot weather nasturtiums often pause blooming regardless of deadheading — they are fast-growing annuals typically replaced each season.

Pinch or cut spent flowers at the stem, removing the seed pod behind the flower if you want to prevent self-seeding. Trim trailing stems back to a healthy leaf node to control spread. No hard pruning is needed or beneficial.