How to Water Blackberries

First three weeks watering schedule: Water blackberries plants during the day. Water more frequently for 2-3 weeks after planting. As a rule of thumb, the top inch of soil is moist during the first 2-3 weeks.

Watering after first three weeks: Water blackberries plants during the day. Then, give them about 1″-2″ per week during growing season and up to 4″ per week during harvest. The plants are rather shallow rooted, so moisture needs to be at the surface. Do not let soil become dry to a depth of 6″.