Watering & Fertilizing Blueberries Without Killing Them

Blueberries have shallow roots and almost no root hairs — the structures most plants use to drink. That one fact explains most of their care: keep the root zone evenly moist (roughly 1–2 inches of water a week during establishment and fruiting), mulch deeply, and never let a young bush wilt hard in a heat wave.

Fertilizer rules

• Little and acid: use a fertilizer labeled for acid-loving plants (azalea/rhododendron type) or ammonium sulfate, at label rates for young bushes — blueberries are easy to overfeed and salt-sensitive.
• Timing: feed as growth starts in spring; a second light application about 6 weeks later suits young bushes. Georgia extension's classic schedule ramps from 1 oz in year one to about 1 oz per foot of bush height from year three — modest amounts, always.
• Never nitrate-heavy or chloride-heavy fertilizers, and keep manure and lime away unless a soil test specifically calls for them.
• Containers: water more often (pots dry fast) and feed lightly but regularly through spring.