What vegetables grow well together in the same bed?

Beans are fantastic companion plants across the board - they fix nitrogen in the soil so everything around them thrives - but keep them away from fennel and garlic, which actually stunt their growth. The real trap most people fall into is cramming too many nitrogen-heavy feeders (like brassicas and squash) in one bed without rotating; you'll absolutely wreck your soil fertility within a couple seasons.

Beans and squash are fantastic companions because the beans fix nitrogen in the soil that squash loves, while squash leaves shade the soil and keep it moist for the beans. Here's something that really works - plant them both with corn (the "three sisters" combo), and the corn stalks give the beans something to climb on instead of needing a trellis, which saves you space and money.

They're great neighbors for heavy feeders like squash and corn - plant them together and you'll boost what everything gets. The trick most people miss is spacing: even good companions need enough room, or you're just asking for mildew and root rot from poor air flow.

The three sisters method - corn, beans, and squash planted together - is pretty much the gold standard because each one solves a problem the others have: corn gives beans something to climb, beans add nitrogen to the soil for both plants, and squash leaves shade the roots and retain moisture. Beyond that setup, most leafy greens (lettuce, spinach, kale) are pretty easygoing neighbors as long as they've got enough room to spread.

Root vegetables like carrots and radishes pair well with leafy greens because they use different soil depths and don't shade each other out. One thing that makes a real difference is succession planting your companions - instead of throwing everything in at once, stagger your lettuce or spinach planting by a couple weeks so you're harvesting some while others are still growing, which keeps pests from zeroing in on one big crop all at once and lets your soil nutrients stretch further.