Peach and Nasturtium

Nasturtiums work well as a ground-level companion under peach trees, occupying space that would otherwise host weeds while attracting hoverflies, parasitic wasps, and other predatory insects that prey on aphids. The primary mechanism is trap-cropping: nasturtium foliage draws stone-fruit aphids away from peach shoots, concentrating pest pressure where it is easier to monitor and manage.

Plant nasturtiums around the drip line rather than against the trunk, giving the root zone room to breathe. Established nasturtiums tolerate the partial shade under a mature peach canopy reasonably well. They prefer lean soil, which suits established peach trees. Avoid high-nitrogen fertilization near nasturtiums, as it drives lush foliage at the expense of flowers and reduces trap-crop effectiveness.

This pairing is most useful during spring flush when aphid pressure peaks on new growth. In low-pest years or in orchards where aphid populations stay minimal through other means, the benefit is modest. Nasturtiums are annuals in most zones, so they require replanting each season.