Where should I plant asparagus?
Written by
Julia Anderson
Reviewed by
Prof. Samuel Fitzgerald, Ph.D.Location for planting asparagus matters, forever. Once, I wasted a season planting my crowns near some walnut trees, as the juglone toxin infected them (stunted growth). Asparagus does best in full sun (6+ hours) and well-drained soil. Keep away from low areas where frost hangs, and try to maximize air circulation to mitigate fungal issues.
Soil Testing
- Use digital pH meter ($20-50 range)
- Test at 6" and 12" depths separately
- Add lime 6 months pre-planting if below 6.5
Drainage Solutions
- Install French drains 18" deep in clay soils
- Mix 3" coarse sand into topsoil
- Elevate beds 12" in rainy climates
Space the plants 18-24 inches apart in a row 4 feet wide. I failed with my first bed as the plants were too crowded and didn't reach their full potential, competing for light and only producing pencil-thin spears. Regardless of the situation, the planting on the north side prevents the asparagus from casting shadows on the tomatoes or beans while allowing the asparagus ferns to rise to the sky without shadowing the sun.
Cold Regions
- Plant against stone walls for radiant heat
- Use dark mulch to warm soil faster
- Delay harvest until soil reaches 45°F
Hot Climates
- Partial afternoon shade prevents scorching
- Mulch with light-colored straw
- Increase watering to 1.5" weekly
Refrain from planting next to alliums or potatoes, which suppress root growth. My most fruitful bed is bordered by marigolds and basil to deter beetles. Check drainage by digging 12" holes in the ground; if the water remains for over an hour, you'll need to amend the soil. A strong healthy asparagus crown can last longer than most perennials, so plant accordingly.
Read the full article: How to Grow Asparagus: Expert Tips for Perennial Success
