29/06/2026
Dangerously hot conditions are forecast for most of Wisconsin this week. Here’s what you need to know to make sure your native plants survive the heat.
First and foremost, take care of yourself. Work in the shade when possible, limit your time outdoors, stay well hydrated, take frequent air conditioning breaks, and protect exposed skin by wearing a hat and using sunscreen.
Most Wisconsin native plants are well adapted to these hot summer temperature swings and will survive just fine without any intervention. They are generally deep rooted and can draw moisture from deep within the soil even on the hottest and driest of days. The US drought monitor map currently lists much of Wisconsin as “abnormally dry” but we’ve not yet reached concerning drought conditions. https://droughtmonitor.unl.edu/
Specific portions of your garden may be drier than others, and supplemental watering can help. Check the soil to a depth of 2-3 inches. If it is dry, water deeply at the base of plants if possible. If a sprinkler must be used, water in the early morning applying 1" of water. A rain gauge or empty container should be used to measure the water application.
What if you notice plants drooping? Wilting of plants occurs when evaporation from leaf tissues occurs faster than roots can take in water. This causes the tissues to experience a drop in turgor pressure and droop. This isn’t necessarily an indication of trouble. Check the soil at the base of the plant. If there is moisture within the top 2-3 inches of an established plant it will likely be fine. Check the plant after direct sun has passed or after sun set. Usually they will perk right back up once shaded or after sundown. Don't overwater simply because you see drooping. Overwatering will cause excess stress and harm the plant further.
Young plants and new transplants may need some additional care. Check their soil moisture daily and supplement with water if needed. Where established plants probably only need supplemental watering once per week, young or unestablised plants may need water every other day. Check frequently and water as needed. Watering heavily every other day is better than watering lightly multiple times per day.
Young or otherwise sensitive plants may benefit from temporary shade during the hottest parts of the day. Umbrellas, shade cloth, even a deck chair set over a plant can provide some temporary relief if you notice a plant in severe distress.
Also please remember to provide fresh clean water sources for our wildlife friends. Clean and fill your birdbaths, especially in urban areas where natural water sources are often unavailable. Don’t forget a ground level pool for critters who can’t climb or fly (rabbits, frogs, etc.)
Trust that these native plants have evolved in this climate and are well adapted to survive it’s extremes and know that your native plant gardens are providing invaluable shade and shelter for wildlife to help them safely survive the heat wave.
