VEGGIES and HERBS
Basil planted near tomatoes will repel white flies and mosquitoes and will attract some really good pollinators.
Carrots and Radishes:
Planting carrot seeds along with radish seeds will help in locating the tiny carrot leaves as radishes sprout earlier and will be harvested first. This procedure assists in the task of thinning the carrots as there will be space left from the harvested radishes.
Rosemary planted near carrots will deter carrot flies and ward off the pesky bean Beatles.
Credit to: Rodney Horticultural Society.