Soil in the Lowcountry—especially in areas like Charleston, Dorchester, and Berkeley Counties—is often sandy, compacted, or low in organic matter. Amending your soil improves drainage, supports healthy root growth, and helps retain nutrients in our hot, humid climate.

Adding compost or other organic materials lets your plants access what they need to thrive—even in tricky native conditions.

✅ Tip from the Tri-County Clemson Extension Master Gardeners:

Always test your soil before amending. It’s the best way to avoid wasting time or money.

For most garden beds in the Charleston area, mixing 2–3 inches of compost into the top 6–8 inches of soil is ideal. This improves moisture retention in sandy soils and adds nutrients without overwhelming roots.

If you’re starting a raised bed or reviving tired turf, a bit more may be helpful—but overdoing it can cause nutrient imbalances or drainage issues.

✅ Master Gardener Tip: Use well-aged compost. If it smells sour or feels slimy, it’s not ready.

Need help choosing compost? [Contact your local Extension office →]

In the Tri-County Lowcountry, poor drainage is common due to clay patches or hardpan soil. If your lawn stays soggy or your garden drowns after every storm, here’s how to fix it:

Aerate and loosen compacted soil

Add organic matter to improve absorption

Build up low areas with compost and topsoil blends

Install a French drain or swale if needed

✅ Extension Advice:

Turfgrass samples and water flow photos can help us diagnose the problem faster. Submit one here or call your local office.

[Submit a Turf or Drainage Issue Sample →]