Companion planting isn't magic but it does make gardening easier when you use it strategically. Here are a few real world reminders: Good companions usually mean: Similar watering needs From personal experience, what is your best and or worst varieties to grow hydroponically? (plus a little grow room update ;) : r Hydroponics Greenbriar Flora of Pennsylvania Plant Profile: Phlox Northern Gardener Datura Island of the Blue Dolphins (U.S. National Park Service) Type of plastic film on high tunnels can filter sunlight, influence plant growth