After several hot, dry weeks a lawn can quickly seem lost: the blades are straw-brown, growth has stopped and every step leaves visible marks. Still, a brown area isn't automatically dead. Turf grasses have their growth point protected close to the soil surface and can shoot again after rain. What's decisive is to first check the condition and only then water, mow or repair.
The quick decision: wait, water or repair?
- Wait: The blades are brown, but at the base there are still firm green or whitish areas. Then the lawn is usually in a dry dormancy.
- Water: The area will continue to be used, the soil is dry several centimeters deep and there are no local restrictions. Then better to water infrequently and deeply instead of a little every day.
- Repair: After a wetter period bare patches remain, the turf comes away easily from the soil or no new shoots appear. Overseeding and soil care are more sensible in the cooler autumn than in the middle of the heat.
Step 1: Check whether the turf is still alive
Pull apart the dry blades in several places. Pay attention not only to the color of the tips but to the area directly above the soil. Firm blade bases and individual green shoots indicate that the plants are still capable of regenerating. Even a short rain can make the first green tips visible.
If individual, sharply defined patches remain brown despite moisture, check for additional causes: compacted soil, waterlogging after storms, animal urine, pest damage or a fungal disease. A uniformly straw-colored area after weeks of drought, by contrast, is more consistent with drought stress. If in doubt, a test at an inconspicuous spot helps: if the turf can be lifted almost without resistance together with its roots, the damage is more severe.
Step 2: Don't mow too short during drought
If hardly any growth is visible, the lawn does not need a routine cut. Only mow when new blades are growing again. Set the mower about one centimeter higher than usual in the hot midsummer and remove at most one third of the growth height per pass. Longer blades shade the soil better; a very short cut increases drought stress.
Do not mow in the hottest part of midday and not while the soil is still soft after watering. Sharp blades cut cleaner than dull ones, which fray the blades. A small amount of finely distributed clippings can remain on the area when mulching and protect the soil from direct sun. Thick clumps, however, should be removed.
Step 3: If you water, do it less often but thoroughly
Daily short sprinkling wets mainly the surface. Much water then evaporates while deeper root layers are hardly reached. "Natur im Garten" gives, as a guideline for lawns, two substantial waterings per week of 20 to 30 liters per square meter each. The actual required amount depends on soil type, slope, precipitation and the condition of the area.
Water preferably early in the morning. Place a straight rain gauge or several equally tall containers on the area to check whether the sprinkler is working evenly. Stop when water runs off on the surface and continue after a short pause. Always observe municipal watering bans or other local regulations. Those who want to save water can also allow a lightly used utility lawn to go brown deliberately and wait for the next heavy rain.
Young trees require a different priority during drought than an established ornamental lawn. You can find information on this in the guide Watering young trees correctly during drought. For pots and balcony boxes, shorter checking intervals apply; for that, How to water balcony plants properly in heat.
Step 4: Wait with overseeding until conditions improve
Scarifying, vigorous raking and overseeding additionally burden an already dry area. Wait until the heat subsides and the soil can be kept reliably moist again. September is favorable in many Austrian locations: the soil is still warm, nights get longer and dew as well as more frequent rainfall support germination.
Then loosen only the actually bare spots superficially, remove dead material and improve heavy soil if necessary with suitable sand and matured compost. Distribute seed evenly, press it in and water gently with a watering can. Once seeds have swollen they must not dry out during the germination phase. Choose a mixture that suits the use, sun exposure and soil type.
Common mistakes after a heat period
- Scarify everything immediately: Wait for recovery after rain first and identify real bare spots.
- Mow very short: That removes additional leaf surface from the grasses and exposes the soil.
- Sprinkle briefly every evening: Surface moisture does not promote deep roots and can remain on the blades for a long time at night.
- Overseed in the heat: Seedlings are more sensitive to drying out than an established lawn.
- Forcing a perfect green: A temporarily brown summer area can be the more water-saving choice.
Use less water in the long term
If dry periods repeat, it's worth adapting instead of increasingly intensive maintenance. Less frequent mowing, a higher cutting height and more herbs in the lawn reduce the effort. Flower or herb lawns contain deeper-rooted species, often tolerate dry sites better and provide food for insects. Heavily used play areas can be kept short, while edge zones are mown less frequently.
The most important rule is therefore: first observe, then act purposefully. A brown lawn can recover. Watering is a decision about use, not an automatic rescue measure. And repairs are more likely to succeed when heat and drought stress are over.
