Zucchini

Privet forms dense canopies and produces allelopathic compounds that suppress nearby vegetable crops

Quailbush produces salt-accumulating allelopathic compounds that can inhibit squash family plants

Toothbrush tree produces mustard oil compounds that can inhibit cucurbit family plants

Chinese photinia creates dense shade and produces allelopathic compounds that inhibit squash growth

Chinese yam's vigorous climbing vines can overwhelm and shade out squash plants when grown together

Large vining squash species compete heavily for space, water, and nutrients due to extensive root systems

Large-fruited squash varieties compete intensively for growing space and soil nutrients

Large squash vines can overwhelm and shade tomato plants while competing for soil nutrients

Large vining squash species compete heavily for garden space and soil nutrients