What plants harm asparagus growth?
Written by
Julia Anderson
Reviewed by
Prof. Samuel Fitzgerald, Ph.D.Companion planting is a major factor in asparagus health. There are plants that will enhance their growth and others that will reduce their yield. I lost 30% of my asparagus crop one year when I planted garlic alongside it. Garlic roots exude something into the soil that inhibits the growth of asparagus. There are three primary culprits that require your attention: Alliums, Potato, and Tomato.
Allium Management
- Plant chives 20 ft away, they deter pests without harming asparagus
- Rotate crops annually to prevent soil-borne inhibitors
- Apply activated charcoal to neutralize allelopathic chemicals
Potato Solutions
- Use bone meal to supplement phosphorus
- Interplant with nitrogen-fixing beans to balance soil
- Create raised beds to separate root zones
Tomatoes attract asparagus beetles, which skeletonize ferns. I now plant marigolds in between rows because of their natural pyrethrins, which repel the beetles. For bad infestations, spray neem oil at dusk when beneficial insects are at rest.Remove any of the nightshade family debris before winter to interrupt the life cycles of the pests.
Safe Companions
- Basil: Repels aphids and improves flavor
- Parsley: Deters asparagus beetles
- Nasturtiums: Trap crop for aphids
Read the full article: How to Grow Asparagus: Expert Tips for Perennial Success
