Managing a Cottage Lawn During Drought: To Mow or Let Seed Heads Mature?

The Situation

A lakeside cottage in Northwestern Ontario with a dry spring, no irrigation, and no fertilizer (to protect the lake). The grass went dormant, but tall seed heads appeared. The owner wonders: mow or let seed drop?

Seed Heads: Mow or Leave?

Either is fine. Most seeds in established lawns don't germinate—especially in drought. If you're staying at the cottage and want to walk on the lawn, mow the seed heads down. If you're leaving, let them be; they'll shatter naturally.

Clippings Management

• Short clippings (under 2 inches): Leave them. They decompose quickly, returning nutrients.
• Long clippings (over 3 inches): They can mat and smother grass. Mow once with bagger, then mulch-mow subsequent cuts.
• Keep clippings out of the lake: Bag or rake if near water to prevent nutrient pollution.

Mowing Height & Frequency

• Mow at 2.5–3.5 inches (measured after cut).
• If grass is very tall, reduce gradually: cut to 5–6 inches, wait a few days, then to 3.5 inches.
• Never remove more than ⅓ of blade length at once.
• Mow when dry, not during drought stress.

Drought Dormancy

Brown grass in summer is often dormant, not dead. Cool-season grasses "play dead" to survive. Do not water intermittently—this breaks dormancy and weakens the plant. Either commit to regular deep watering all season, or let it stay dormant until fall rains return.

Fertilization for Lake Protection

• Apply slow-release organic fertilizer in early fall and late fall only.
• Avoid spring/summer fertilization—promotes top growth at expense of roots.
• Use phosphorus-free fertilizer near water bodies.

Environmental Bonus

Reducing mowed area near the lake and planting native buffer strips filters runoff, protects water quality, and reduces maintenance. A "wilder" shoreline is often healthier for the ecosystem.