Use self–watering wall planters like these from Amazon to keep humidity-loving tropicals happy and hydrated.
Design tip: Mix and match, but stay within a palette. Even with vertical plants indoor, a consistent theme or color family pulls your garden together without overwhelming the space.
8. Companion Planting in Vertical Gardens
Companion planting isn’t just for large garden beds; it also works in vertical gardens.
When you combine the right plants, you can enhance growth, naturally repel pests, and make better use of limited spaces. For small-space or indoor gardeners, that means less work, healthier plants, and a more efficient vertical setup.
Here’s how to do it without turning your wall into a war zone.
Best Vertical-Friendly Companion Pairs
- Basil + Tomatoes. Basil boosts tomato flavor + repels pests
- Lettuce + Carrots. Lettuce shades the soil, carrots grow downward
- Spinach + Strawberries. Shared water + light needs, compact roots
- Mint + Leafy Greens. Mint deters pests, but grows aggressively
For tighter setups, plant companion pairs in side-by-side pouches or stackable pockets, just make sure their root systems don’t compete.
Combos to Avoid in Tight Spaces
Some plants just don’t get along, especially in close quarters. Avoid these combos in your vertical layout:
- Onions + Beans: Onion roots can stunt bean growth
- Cucumbers + Aromatic Herbs: Strong scents may interfere with cucumber growth or attract pests
If you’re using wall-mounted vertical planters, avoid mixing aggressive growers (like mint or tomatoes) in the same pocket. Give them their own space.
Mini tip: Use modular vertical garden kits, like Mr. Stacky from Amazon, that let you reconfigure sections, perfect for isolating bossy plants like mint while still keeping your garden compact.
Forgot to water? Add a soil moisture sensor to your vertical setup, especially helpful for wall planters or stacked containers.
Care Essentials for Your Vertical Plants
Once you’ve picked the best plants for vertical gardening, don’t forget the behind-the-scenes helpers: the right soil mix and occasional feeding can make a huge difference in growth, especially in containers or wall setups.
Here are a few small-space-friendly add-ons that actually help: