Late Winter Feb–early Mar |
Cleanups, branch checks, plan sprinkler repairs, light raking if needed |
Snow mold pockets, clogged sprinkler heads, early-season bare spots |
Avoid aggressive dethatching while the lawn is still weak. |
Spring mid Mar–May |
Pre-emergent timing, balanced fertilization, sprinkler start-up & coverage check, mowing routine |
Crabgrass/annual weeds, uneven growth from dry spots, early weed explosions |
University of Idaho Extension notes spring green-up timing in the region often starts mid-March to early April—perfect for inspections and early applications. |
Early Summer Jun–early Jul |
Irrigation consistency, grub prevention if you’ve had damage before, spot weed control, mowing height adjustments |
Heat stress, thinning, “mystery brown patches,” grub-related root loss |
Many turf programs target preventive grub control in early summer (often around late June into July, depending on product and history). |
Late Summer late Jul–Aug |
Heat-stress support, irrigation audits, avoid heavy renovation during extreme heat |
Scorching, shallow roots, disease pressure in overwatered areas |
If you plan to seed, start prepping now so you’re ready when nights cool. |
Fall Sep–Oct |
Core aeration, overseeding thin areas, fall fertilization, perennial weed control, sprinkler winterization planning |
Compaction, winter thinning, spring weed pressure, poor spring green-up |
University of Idaho Extension lists fall and spring as ideal aeration windows; many Treasure Valley pros emphasize fall as the best window. |
Late Fall / Early Winter late Oct–Nov |
Sprinkler blow-outs, final mow, leaf cleanup, tree dormant-season care planning |
Frozen-line sprinkler damage, snow mold pockets, messy spring cleanup |
Many homeowners schedule blow-outs mid-to-late October, depending on irrigation shutoff and early freezes. |