Lawn Care Plan for New York, NY

• •Apply pre-emergent when soil temps approach 55°F at 4" depth
• •Begin mowing at 3-3.5" as growth resumes
• •Spot-treat winter broadleaf weeds (henbit, chickweed)

Pre-emergent must go down BEFORE soil hits 55°F — crabgrass germinates at that threshold. Note: spring pre-emergent prevents fall overseeding for 8-12 weeks. If you plan to overseed in fall, this is still fine — the barrier wears off by September.

• •First nitrogen application (0.5 lb N/1K sqft)
• •Mow every 5-7 days at 3-3.5"
• •Spot-treat broadleaf weeds with 2,4-D or triclopyr

Spring growth peak begins. Keep nitrogen light — heavy spring N promotes leaf growth at the expense of roots and increases summer disease risk. Never remove more than 1/3 of blade height per mow.

• •Second nitrogen application (0.5 lb N/1K sqft)
• •Mow every 5-7 days at 3-3.5"
• •Begin regular watering schedule (1-1.5" per week)
• •Monitor for brown patch as humidity and temps rise

Transition to summer care. Reduce nitrogen going forward — excess N in late spring feeds brown patch. Begin deep, infrequent watering as temperatures climb.

• •Raise mowing height to 4" for summer heat protection
• •Water deeply 1-2 times per week, early morning only
• •Monitor for brown patch — circular patches with smoke ring border
• •Reduce or stop nitrogen applications

Summer stress begins. Taller mowing height shades roots, retains moisture, and reduces soil temperature. Avoid fertilizing with nitrogen — it fuels brown patch. If you must feed, use iron for color without disease risk.

• •Maintain mowing at 4" — mow as needed
• •Water deeply to maintain 1-1.5" per week
• •NO nitrogen fertilizer
• •Treat brown patch with azoxystrobin if severe
• •Avoid heavy foot traffic on stressed turf

Survival mode for fescue. Growth slows dramatically in summer heat. Brown patch peaks during hot, humid nights above 70°F. Do not fertilize — let the grass ride it out. Some thinning is normal and will be repaired by fall overseeding.

• •Continue survival watering — deep and infrequent
• •Scout for grub damage (irregular brown patches that peel up)
• •Plan fall renovation — order seed, rent aerator
• •Late August: begin prepping for overseeding (mow lower, dethatch)

Late August marks the transition to fall — the most important season for fescue. Begin planning your overseeding and aeration. If grubs are present (spongy turf, birds feeding), apply curative grub control (trichlorfon or carbaryl).

• •Core aerate the entire lawn
• •Overseed thin areas at 3-4 lb/1K sqft (or 6-8 lb for full renovation)
• •First fall nitrogen application (1 lb N/1K sqft)
• •Water lightly and frequently to keep seed moist until germination (7-12 days)

THE most important month for fescue lawns. Core aerate first, then overseed, then fertilize. Fescue does NOT spread — it only tillers. If you skip fall overseeding, thin areas will stay thin. Soil temps should be 50°F+ for good germination. Seed-to-soil contact is critical.

• •Second fall nitrogen application (0.5-1 lb N/1K sqft)
• •Resume mowing at 3-3.5" as fall growth peaks
• •Apply fall pre-emergent for Poa annua (only if NOT overseeding or seed has fully established)
• •Continue watering new seedlings if rainfall is insufficient

Fall growth peak — fescue is actively tillering and thickening. If you overseeded in September, wait until new grass has been mowed 2-3 times before applying any pre-emergent. Do not apply pre-emergent over seedlings that haven't germinated yet.

• •Final "winterizer" nitrogen application (1 lb N/1K sqft)
• •Lower mowing height to 3" for final cut of the season
• •Remove fallen leaves — don't let them smother the lawn

The winterizer application is the single most important feeding of the year for fescue. Applied after top growth stops but before the ground freezes, it feeds the roots all winter and produces the best spring green-up. Keep leaves cleared — smothered fescue develops snow mold.