As July temperatures climb across the Greater Toronto Area (GTA), your garden doesn’t have to suffer. With rising humidity, periods of drought, and changing weather patterns, now’s the time to adopt smart, water-wise gardening strategies. Whether you’re new to gardening or looking for low-maintenance solutions, these GTA-specific tips will help you save water, protect your plants, and enjoy a resilient garden all summer long.
Why Water-Wise Gardening Matters in the GTA
Summer in the GTA can bring long dry spells, hot days, and occasional downpours. Water-wise gardening helps you adapt to these fluctuations. With the right techniques and plant choices, you can conserve water, reduce maintenance, and still grow a thriving landscape—whether you're gardening in Mississauga, Markham, or downtown Toronto.
1. Choose Drought-Tolerant Plants for Ontario
Opt for plants that handle heat and dry conditions well. Some great choices for the GTA include lavender, black-eyed Susan (a native favourite), yarrow, Russian sage, sedum, and ornamental grasses like switchgrass or feather reed grass.
Pro Tip: Visit your local garden centre for advice on native and climate-resilient options best suited for Southern Ontario.
2. Mulch to Lock in Moisture
A thick layer (2–3 inches) of organic mulch like shredded bark, cedar mulch, or composted leaves helps reduce evaporation and keep roots cool—essential for hot GTA summers.
Mulch Tip: Mulch early in July to make the most of cooler soil temperatures and keep summer storms from washing moisture away.
3. Water Deeply and Wisely
Instead of shallow watering every day, water your plants deeply 1–2 times per week. This encourages deeper roots that can withstand dry spells common in July.
Timing Tip: Water in the early morning when temperatures are cooler and your plants can absorb moisture before it evaporates.
4. Install Efficient Irrigation Systems
Soaker hoses or drip irrigation systems are ideal for GTA gardens. They deliver water right to the root zone with little waste, helping you follow any summer watering restrictions while still supporting your plants.
Bonus: You’ll also cut down on fungal issues by avoiding wet foliage.
5. Group Plants by Water Needs
In a climate as variable as Ontario’s, it’s smart to group plants based on their watering needs. This helps prevent overwatering and ensures you’re using water where it counts.
Design Tip: Keep thirstier plants, like annual flowers, closer to the house or hose and drought-tolerant types in drier areas.
6. Improve Soil Structure
Southern Ontario soil can range from clay-heavy to sandy. Adding compost or organic matter improves water retention in sandy soils and drainage in heavy clay. Healthier soil means less frequent watering and stronger root development.
7. Reconsider Your Lawn
Lawns use more water than almost any other part of the landscape. Shrink your turf by replacing parts with groundcovers, native perennials, or gravel pathways. Clover, thyme, and native sedges make great lawn alternatives in the GTA.
Bonus: Collect Rainwater for Free Irrigation
With summer storms hitting the GTA in bursts, take advantage by installing a rain barrel. Captured water is great for watering garden beds, containers, or even lawns during dry spells.
With a bit of planning, your GTA garden can beat the heat and stay green and gorgeous all season long. Visit our garden centre for expert local advice and the best plants for Ontario’s summer conditions.