Gardening Through Drought: How to Water Wisely & Prioritize Plants

Worst drought in memory, garden wilting. Which plants get precious water? Don't panic—here's drought triage.

First Priority: Recent Plantings

Bare-root trees/shrubs (planted previous autumn/winter), new perennials—highest risk. No deep water-seeking roots yet. Supplement their supply. During hose bans, annual bedding (marigolds, impatiens) are probable casualties—sacrifice them for a Japanese maple. Rule: if soil 2" down is dry, water.

Container Plants

Grow above water table—only container soil holds moisture. If dry, roots have nowhere to go. Check 2" down. Use catch trays for excess. Terracotta absorbs water plants can't access. Drought-tolerant container plants (once established): Arctotis, Lantana, Plectranthus, Portulaca, Zinnia.

Vegetables & Fruit

Moisture-hungry: tomatoes, peas, onions, cucumbers, marrows, lettuce. Insufficient water = shriveled produce. Fruiting plants (strawberries, raspberries, currants, fruit trees) need water during fruit formation (70–90% water content). Exposed/windy areas need extra—wind desiccates foliage. Deep watering prevents this.

Shallow Rooters & Moisture Lovers

At risk: Rhododendron, Azalea, Heather, Hydrangea, Birch (shallow roots). Hosta, Ferns, Helleborus, Sarcococca, Fatsia, Camellia (moisture lovers). Climbers/wall-shrubs near house walls struggle (rain shadow). Drought-tolerant climbers (established): Clematis Montana, Fallopia, Jasminum, Trachelospermum, Vitis.

Lawns: Last Priority

People water lawns first—they're large, brown early. But lawns are resilient: brown foliage recovers after rain; roots wait it out. Only fine-grass lawns suffer prolonged drought. Utility seed mixes bounce back.

How to Apply Water (If Available)

Sprinklers waste. Choose hand-watering or seep/drip irrigation. Hand-water: direct to base, 10L per m². Light watering encourages surface roots—harmful. Runoff? Sink gravel-filled 2L pot at base, water slowly. Seep hose/porous pipe woven through beds = direct, efficient.

Article by James Kilkelly, garden designer, Galway, Ireland. gardenplansireland.com