The best plants pair well with bananas by covering bare ground or chasing pests away. Your top picks include sweet potatoes, comfrey, taro, and lemongrass. Add beans or pigeon peas to fix nitrogen in the soil for your bananas too.
Banana companion planting puts every garden plant to work. Each one does more than one job at the same time. I started putting sweet potato vines under my banana mats two years ago. The results showed up right away. Bare soil that used to dry out and sprout weeds stayed moist and clean under that thick carpet of sweet potato leaves. My bananas grew taller that year, and I got a bonus sweet potato harvest in fall.
Banana roots spread across a wide zone 6 to 10 feet from the stalk near the soil surface. That big footprint of bare dirt dries out fast in sun and wind. Companion plants fill that space and keep the ground from losing moisture. Pick plants with surface-level roots that won't steal water from the banana rhizome below. Deep-rooted trees or shrubs planted too close will fight your bananas and slow their growth down.
Comfrey the Nutrient Miner
- Root action: Comfrey sends taproots 6 to 8 feet deep to pull up potassium and calcium that banana surface roots can't reach on their own.
- Mulch source: Cut comfrey leaves 3 to 4 times per season and drop them around the banana base as free, nutrient-rich mulch.
- Spacing note: Plant comfrey 3 feet from the stalk so the leaves spread toward the banana without crowding the base.
Lemongrass Pest Barrier
- Pest fighter: Citral compounds in lemongrass repel aphids, whiteflies, and other soft-bodied insects that attack young banana leaves.
- Placement tip: Ring the outer edge of your banana mat with clumps spaced 2 feet apart to form a fragrant pest barrier.
- Bonus harvest: Cut lemongrass stalks for cooking all season long without hurting the pest protection they give your bananas.
Beans and Pigeon Peas
- Nitrogen boost: Legume roots host bacteria that turn air nitrogen into plant food, feeding your heavy-feeding bananas for free.
- Growth habit: Bush beans fill ground space between mats while pigeon peas grow tall enough to block some wind on exposed sides.
- Rotation tip: Plant a new round of beans every 8 to 10 weeks in warm weather to keep nitrogen flowing all season.
Taro for Shady Spots
- Light needs: Taro thrives in the partial shade that banana leaves cast below, fitting right under the canopy with no issues.
- Water match: Both taro and bananas like steady moisture, so they share the same watering routine without extra work for you.
- Edible bonus: Harvest taro corms after 8 to 12 months for a starchy root crop that adds to your banana harvest.
When choosing what to plant near bananas, keep a 2 to 3 foot buffer around each stalk base. This gap gives you room to feed the plant, check for pests, and remove spent stalks after harvest. Fill in your companions from that buffer zone out to the edges of the root spread. I made the mistake of planting comfrey too close to the base my first year. It crowded the stalk and made it hard to inspect for problems. Moving it out to 3 feet fixed everything.
Stay away from plants with aggressive roots near your banana mats. Bamboo, large trees, and spreading ground covers like mint will outcompete your bananas fast. They steal water from the surface-level rhizome and slow everything down. Pick the companions above and space them right. Your banana patch becomes a small food forest. You get more food from the same ground with less watering and fertilizing work.
Read the full article: Growing Bananas: Expert Advice for Abundant Harvests
