Photo: Tom Fenenga for Bob Vila We may earn revenue from the products available on this page and participate in affiliate programs. Learn More › Home Advice You Can Trust Tips, tricks & ideas for a better home and yard, delivered to your inbox daily. No matter what color your thumb, you likely already know that all plants need water to reach their full potential—after all, that basic knowledge goes back to introductory middle-school science class. But what you might not know is that incorrect plant watering techniques can put plants at risk for disease and even kill them. Whether you want to cultivate pretty outdoor perennials or you just bought a new houseplant, heed these best and worst practices for watering plants indoors and out and you’ll reap healthy, happy specimens. Watering Outdoor Plants 1. DO hydrate plants in the morning. The best time of day to water plants is in the morning, says Peter Pappas , an irrigation system designer in Middlesex County, Massachusetts.…