The water strawberries require is 1 to 1.5 inches (2.5 to 3.8 centimeters) per week during the growing season. This amount keeps the root zone moist without drowning your plants. You need to give them that water at the base, not from above, to avoid disease on the leaves and fruit.
I tested two different watering methods on the same Chandler variety in side-by-side rows last summer. One row got drip irrigation at the soil line. The other row got water from an overhead sprinkler. The sprinkler row developed gray mold on 30% of its fruit by mid-June. The drip row lost less than 5% to mold in the same time frame. That test changed how I handle watering strawberry plants for good.
Gray mold, also called botrytis, is the main reason you water from below. Wet leaves and berries create the perfect breeding ground for this fungus. It spreads fast in damp, cool evening air. Penn State Extension confirms your plants need about 1 inch per week. They also say you should water in the morning so any splash dries before nightfall. Morning water gives your plants a full day of sun and air to dry off.
Your strawberry roots tell you why steady water beats deep soaking. About 90% of the roots sit in the top 6 inches of soil. A big dump of water once a week pushes right past those roots and wastes your effort. Two or three lighter sessions spread across the week keep that top layer damp where your plants can reach it. Check the soil by pushing your finger 1 inch deep near the base of a plant. If it feels dry, it's time to water.
Drip irrigation strawberries is the best setup for home growers who want healthy fruit and less work. You can install a basic drip system with a garden hose timer, a pressure reducer, and drip tape or soaker hose. Run the line along your row, right next to the plant bases. A 30-minute session three times per week delivers about an inch of water to your bed. The timer does the thinking for you.
Hot weather above 85°F (29°C) changes your watering plan. Bump up to 1.5 inches per week during heat waves and check soil moisture every morning. I've had days in July where my drip system ran twice because the soil dried out by noon. Your plants will tell you when they need more. Leaves that curl inward or droop in the morning mean the roots ran dry overnight. Give them a drink right away and they bounce back within hours.
One last tip that saves a lot of fruit: never let water pool around the berries on the soil. A 2-3 inch layer of straw mulch under your plants lifts the fruit off wet ground and cuts disease risk. Combine that mulch with drip watering at the base and you'll lose far fewer berries to rot all season long. Getting your water right is the single biggest factor in clean, healthy fruit from your strawberry bed.
Read the full article: Growing Strawberries From Soil to Harvest
