Trees & Shrubs Under Stress from Drought in Nova Scotia

Unlike annuals, trees and shrubs are long-lived investments. Their deep roots usually bridge short dry spells, but extended drought depletes even deep soil moisture. Urban and roadside trees fare worse due to compacted soils, pavement heat, and limited rooting space.

The Ripple Effect

Less foliage and growth means less shade, habitat, and carbon capture. Fruit- and berry-producing shrubs yield less, affecting birds and pollinators. Declining trees also increase storm-breakage risk.

What To Do Right Now

1. Water deeply—but not every day

• Target: The entire area under the canopy (the “dripline”), not just the trunk.

• Frequency: 1–2 deep soakings per week during drought; taper once consistent rainfall returns.

• How much (rule of thumb):

  • Newly planted trees (first 2–3 years): ~10 US gal (≈38 L) per inch of trunk diameter per week.

    • Example: 2″ (5 cm) trunk → ~20 US gal (≈76 L) weekly, split into 1–2 deep waterings.

  • Established trees/shrubs: Aim for 25–30 mm (≈1″) of water per week into the root zone.

• Timing: Early morning (5–9 am) is best. Avoid hot, windy afternoons.

• DIY flow check: Time how long your hose takes to fill a 10 L pail. If it’s 30 seconds, flow ≈20 L/min; delivering 80 L takes ~4 minutes per watering station—move the hose around the dripline.

• Tools that help: soaker hoses under the canopy, slow-release tree bags, or a 20 L bucket with small holes for a steady trickle.

2. Mulch correctly

• Depth: 5–10 cm (2–4″) of shredded bark/composted mulch over the root zone.

• Keep clear: Leave a 10 cm (4″) gap around the trunk—no “volcano mulching.”

• Why: Mulch cools soil, reduces evaporation, and limits weed competition.

3. Pause stress-inducing work

• Hold off on pruning (beyond removing dead/dangerous wood).

• Avoid fertilizing in drought; salts and excess nitrogen stress roots. Resume after soaking rains or next spring, ideally based on a soil test.

4. Prioritize who gets water

• Highest priority: Plants installed in the last 2–3 years; shallow-rooted species; anything showing scorch or wilting.

• Next: Valuable specimens and screening/anchor plantings.

• Lawn: It can go dormant and recover—trees and shrubs can’t “reseed” themselves as easily.

5. Protect the root zone

• Minimize soil compaction (no parking or heavy foot traffic under the canopy).

• Keep beds weed-free—weeds steal moisture.

• Avoid herbicides around stressed roots.

6. Work with the weather (and rules)

• Check municipal watering advisories and odd/even rules; drip/soaker methods are often permitted longer than sprinklers.

Planning Ahead (Fall & Next Spring)

• After rains return: Resume normal watering, then deep-water before the ground freezes to charge roots for winter.

• Plant selection: Consider more drought-resilient choices for exposed sites (oaks, hawthorn, some junipers/inkberry holly). Group plants by water needs.

• Soil building: Annual top-dressing with compost boosts water-holding capacity.

• Irrigation: Install simple drip lines with timers for beds and hedgerows.

When to Call an Arborist

• 30% or more of the canopy is brown or bare

• Large dead limbs, new leaning, cracking, or heaving soil at the base

• Sawdust (“frass”) indicating borer activity

• Conifers browning from the inside out or across whole sections

Quick Care Checklist

• Deep-water priority trees/shrubs 1–2×/week

• Add/refresh 5–10 cm mulch; keep away from trunks

• Pause pruning/fertilizing until consistent rainfall returns

• Weed beds; prevent compaction under canopies

• Note hazards or severe dieback and book an assessment

“Peace of mind: some independent garden centres (IGCs) offer warranties on trees and shrubs. At Blomidon Nurseries, eligible plants can be covered under the MYKE Tree & Shrub 5-Year Warranty when planted with MYKE the day you buy them—ask us for details.”