The worst plants near pomegranates are ground covers with short roots, thirsty plants that need lots of water, and tall trees that cast shade. Pomegranates want dry soil between waterings and full sun all day. Any plant that fights for those same resources or blocks the light will hurt your tree's health and fruit output.
I noticed this problem first-hand when lawn grass crept right up to the base of my pomegranate. The tree lost vigor over one season. The grass stole moisture and nutrients from the same upper root zone. I also saw more fungal issues near the trunk where the grass held moisture against the bark. Once I cleared a mulched ring around the base, the tree bounced back within a few months.
Good pomegranate companion plants are ones that share the same love of dry, sunny conditions. Lavender, rosemary, thyme, and sage all work great planted a few feet away. These herbs don't need much water and won't compete with your pomegranate's roots. They also attract helpful pollinators that boost your fruit set. Stay away from hostas, ferns, or other shade-loving plants that need constant moisture.
The science behind bad pairings is simple. Pomegranates come from dry climates and prefer their roots to dry out between waterings. Plants that raise the humidity around the trunk create perfect conditions for fungal diseases. UGA Extension notes that excess moisture spreads leaf spot and fruit rot fungi. Any plant that traps moisture near your tree adds disease risk you don't need.
Tall shade trees and dense hedges cause a different kind of problem. They block the 6 or more hours of sun your pomegranate needs each day. A shaded pomegranate will grow leaves but produce few flowers and even fewer fruit. I've seen pomegranates planted under oak trees that put on green growth but never fruited. Full sun from morning to evening is not optional for these trees.
Keep a 3-foot (0.9-meter) mulched ring around the base of your tree. No grass, no ground cover, nothing growing in that zone. This bare mulched area keeps the trunk dry, cuts down on root competition, and gives you easy access for pruning and harvest. Use wood chips or bark mulch about 3 inches deep and refresh it once a year.
For pomegranate garden spacing, plant your tree at least 15 feet from other large trees or structures that could shade it. If you're planting multiple pomegranates, space them 12 to 18 feet apart so each one gets full sun and good air flow between the canopies. Pair them with drought-tolerant herbs around the outer edge of the mulch ring. This setup gives your tree everything it needs while keeping problem plants out of the way.
Read the full article: Growing Pomegranate: Expert Advice
