is the first crop that comes to mind.
Although fennel is quite fragrant and productive in the garden, it actually releases certain compounds into the soil that can inhibit the growth of nearby plants, including peppers.
2: Brassicas
Peppers and Cabbage
Brassicas (like cabbage, kale, or broccoli) and peppers don’t make a good, harmonious pairing because they have different growth needs and can compete for nutrients quite aggressively.
One of my early pepper plants never grew properly because I had planted kale too close to it. Don’t repeat the same