Seasonal Lawn Care Guide for Idaho
Idaho's Treasure Valley sits in USDA Hardiness Zones 6b through 7a, with hot, dry summers reaching 95-100 F and cold winters that drop below zero. This month-by-month calendar tells you exactly when to mow, fertilize, aerate, water, and winterize your lawn for the best results in Kuna, Boise, Meridian, Eagle, Star, and Middleton.
spring Lawn Care
Remove leaves, twigs, and debris from the lawn and landscape beds. Clear drainage areas and gutters. This is the foundation for a healthy growing season.
Spring CleanupApply pre-emergent weed control before soil temperatures hit 55 F consistently (typically late March in the Treasure Valley). This prevents crabgrass and annual weeds from germinating.
Weed ControlTurn on each zone and check for broken heads, leaks, and coverage gaps. Repair any winter damage before you need full watering capacity.
Sprinkler RepairBegin mowing when grass is actively growing, typically mid-April. Set your mower to 3 inches for the first cut. Avoid cutting more than one-third of the blade height at once.
Lawn MowingApply a balanced slow-release fertilizer once soil temps reach 55 F. This fuels spring green-up and root development. Avoid high-nitrogen blasts that promote weak top growth.
FertilizationStart irrigation schedules at 2-3 days per week, adjusting based on rainfall. Treasure Valley lawns need about 1 to 1.5 inches of water per week in spring.
Irrigation MaintenancePeak spring growth means weekly mowing is important. Maintain a cutting height of 3 to 3.5 inches to promote root depth and shade out weeds.
Lawn MowingSpot-treat broadleaf weeds like dandelions and clover that escaped pre-emergent. Treat when weeds are actively growing for best results.
Weed ControlApply 2-3 inches of mulch around trees, shrubs, and flower beds. Mulch retains moisture, regulates soil temperature, and suppresses weeds.
Mulch Installationsummer Lawn Care
As temperatures climb, increase watering to 4-5 days per week. Water deeply and early in the morning (before 8 AM) to reduce evaporation. Target 1.5 to 2 inches per week.
Raise your cutting height to 3.5 inches. Taller grass shades roots, retains moisture, and stays greener through the heat of summer.
Lawn MowingShape hedges and shrubs after their first flush of spring growth. This is the ideal window for trimming before summer heat stresses the plants.
Hedge TrimmingWatch for signs of drought stress: bluish-gray color, footprints that linger, and wilting. Water deeply when you see these signs rather than waiting for your schedule.
Do not fertilize during peak summer heat. Nitrogen pushes tender new growth that burns easily. Wait until September for the next application.
Perform a can test: place tuna cans around your lawn and run each zone for 15 minutes. Adjust heads to ensure even coverage with no dry spots.
Irrigation MaintenanceSchedule aeration, overseeding, and fall cleanup services now. August and early September are the busiest booking months for fall lawn care in the Treasure Valley.
Check for grub damage by pulling back turf in brown areas. If you find white grubs, apply a targeted treatment before they cause major damage.
Continue weekly mowing at 3.5 inches. Late summer growth may slow, so you may be able to shift to every 10 days as temperatures moderate.
Lawn Mowingfall Lawn Care
Fall aeration is the single most important thing you can do for Treasure Valley clay soil. Aeration relieves compaction, improves water penetration, and lets roots expand before winter.
AerationAfter aeration, overseed with Kentucky bluegrass or a bluegrass-fescue blend. September soil temperatures are ideal for seed germination in Idaho.
OverseedingApply a balanced fall fertilizer to fuel root growth before dormancy. This is the most important fertilizer application of the year for cool-season grasses.
FertilizationRemove fallen leaves promptly. A thick layer of leaves left on the lawn smothers grass, promotes fungus, and invites pests. Leaf removal is essential for winter lawn health.
Fall CleanupLower your mowing height to 2.5 inches for the final cut. Shorter grass going into winter reduces snow mold risk and keeps the lawn tidy until spring.
Lawn MowingSchedule your sprinkler blowout before the first hard freeze (typically late October to early November in the Treasure Valley). Frozen water in lines causes costly pipe and valve damage.
Sprinkler BlowoutIf not done in October, get your irrigation system blown out immediately. Hard freezes can arrive any day now and unprotected lines will crack.
Sprinkler BlowoutProfessional holiday lighting installation is best done before freezing temperatures and snow make rooflines slippery. Book early for the best selection of dates.
Christmas Light InstallationApply a layer of mulch around the base of young trees and tender perennials to insulate roots from freeze-thaw cycles through winter.
winter Lawn Care
Review your landscape goals for the year. Schedule consultations for hardscaping, irrigation upgrades, or landscape redesigns before the spring rush.
Heavy snow on shrubs and young trees can cause branch damage. Gently brush off excess snow, but leave ice alone to avoid snapping branches.
Snow RemovalConfirm your sprinkler system was properly blown out last fall. If you missed the winterization window, call immediately to prevent freeze damage.
Sprinkler BlowoutGet your mower serviced before the season starts. Sharp blades cut cleanly, reducing disease risk and giving your lawn a better appearance.
Treasure Valley clay soil benefits from compost and gypsum. Order amendments early so they are ready when the ground thaws.
Late winter is an ideal time to prune dormant deciduous trees and remove any dead or damaged branches before new growth starts.
Tree TrimmingKeep driveways, walkways, and entrances clear after snowfall. Prompt removal prevents ice buildup and keeps your property safe and accessible.
Snow RemovalIf you scheduled professional installation, sit back and enjoy the display. We handle maintenance and will return in January for removal.
Christmas Light InstallationTake notes on what worked and what did not this year. Were there persistent brown spots? Drainage issues? Use this information to plan improvements for next spring.
Let us handle the seasonal work for you
From spring cleanup to winterization, our team takes care of every step on this calendar so you can enjoy a great-looking lawn without the effort.