Lawn & landscaping
Care for tall fescue in Idaho
Tall fescue develops deeper roots and generally uses less water and fertilizer than Kentucky bluegrass, but it still benefits from correct mowing and fall-focused care.
Recommended timingSpring through fall
What to do
- Mow roughly 2–3 1/2 inches high and remove no more than one-third of the blade at one mowing.
- Water deeply and according to soil moisture, weather and actual sprinkler output; allow the surface to dry between irrigation cycles without severe wilt.
- Use modest spring fertility only when needed for color and make late summer to early fall the primary Idaho feeding window.
- Overseed thin areas with a compatible tall-fescue cultivar because tall fescue does not spread as aggressively as Kentucky bluegrass.
- Aerate compacted areas during active growth and diagnose spreading brown patches before applying a product.
Use a soil test and exact product label before applying fertilizer or pesticide, and protect wells, waterways, people and pets.
Official guidance and sources
Product instructions and local requirements take priority for the equipment or material installed at your home.