Myrtle Beach and Horry County's subtropical coastal climate creates a lawn care calendar that surprises most homeowners who move here from inland or northern markets. The growing season is longer, the grass types are different, the heat is more intense, and the maintenance windows are tighter than most people expect. Getting the timing right — mowing at the right height, fertilizing at the right moment, applying pre-emergent before the weeds germinate — makes the difference between a lawn that looks great all season and one that requires constant reactive intervention.
This is the month-by-month schedule we follow for Horry County lawns, based on the specific conditions of coastal South Carolina's climate, soil, and grass types.
Everything in this schedule assumes warm-season grass, which is what nearly all Horry County lawns are. The four main varieties and their mowing heights:
| Grass Type | Mow Height | Peak Season | Notes |
|---|---|---|---|
| Bermuda | 1.5–2 inches | May–September | Most common, fastest growth, needs frequent mowing at peak |
| Zoysia | 1–2.5 inches | May–September | Slower growth, finer texture, better shade tolerance |
| St. Augustine | 3–4 inches | April–October | Best for shade and salt air, higher water demand |
| Centipede | 1.5–2.5 inches | April–October | Low fertility, acid soil preferred, low traffic tolerance |
The most common mistake Horry County homeowners make is applying fertilizer in late February or early March before the lawn has fully greened up. Fertilizer applied to dormant grass is wasted — the grass can't take it up, it leaches into the soil, and you've paid for nothing. Wait until the lawn is fully green and actively growing before applying the first nitrogen application, typically late March to early April for most Horry County lawns.
Pre-emergent herbicide for crabgrass must be applied before soil temperatures reach 55°F consistently — in Myrtle Beach, this window is typically February 1–15. Miss this window and crabgrass germinates; once it's germinated, pre-emergent won't control it and you're stuck with post-emergent spot treatment for the rest of the season.
Scalping a lawn — cutting it too short — removes the leaf blade that shades the soil and root zone. In Myrtle Beach's July heat, soil exposed by scalping heats to temperatures that stress or kill grass roots. Raise your mow height by a half-inch during July and August and never remove more than one-third of the blade height in a single mowing.
Ray & Courtney Cloyd · 843-467-7136 · info@bakerss.com · We answer 24/7
Get a Free Estimate → 📞 843-467-7136First mow of the year in Myrtle Beach typically happens in mid-to-late March when the lawn shows active green growth across most of its surface. Bermuda lawns benefit from a low scalp cut (0.5–1 inch) in early March to remove thatch before green-up — then allow to green up before returning to normal mow height.
Every 7–10 days for most warm-season grasses during May through September. Bermuda grass at peak summer growth (July–August) may need mowing every 5–7 days to maintain proper height without removing more than one-third of the blade in a single cut.
Spring pre-emergent for crabgrass should be applied by February 15 in Myrtle Beach — before soil temperatures reach 55°F. Fall pre-emergent for winter annual weeds (poa annua, henbit) should be applied in September before fall soil temperatures drop. Timing is everything — pre-emergent applied after germination does nothing.
First application: after the lawn is fully green in late March/early April. Second application: May or early June with slow-release fertilizer. Third application: late August with a balanced formula. Final application: September only if needed, with low nitrogen. No fertilizer November through February.