❎ Poor plant companionship - what does that mean?

Plants with different requirements for space or sunlight should not be planted next to each other. For example:
Tomatoes and cabbage
Carrots and cabbage
Parsley and cauliflower
Celery and cabbage

✅ Good plant companionship, on the other hand, includes:
Onions and radishes
Cauliflower, kohlrabi, cabbage
Spinach and tomatoes
Basil and tomatoes