How to Seed Grass Near Olive Trees

Dig a hole 3 to 4 inches deep and collect soil for a pH test. Olive trees require a soil pH between 5.5 and 8.5; most grass types prefer a soil pH of 6.0 to 7.0. Collect 1/2 cup of soil and send it to your local cooperative extension. Wait three to four weeks for the results. Spread lime across the targeted area if the soil is too acidic — under 6.0. Amend the targeted with sulfur if the soil pH is 7.0 or higher, which means it is too alkaline.

Remove any vegetation growing around the base of the olive tree, being careful to avoid damage to the roots. Spread a layer of 3 to 4 inches of pine straw mulch from near the base of the tree to the dripline — the area directly underneath the outermost branches. By mulching the olive tree, you prevent grass seedlings from competing with the tree.

Apply a starter fertilizer high in phosphorous at a rate of 6 lbs. per 1,000 square feet using a drop spreader. Work the starter fertilizer into the first 2 to 3 inches of soil. Starter fertilizer helps grass produce healthy root systems, which is especially important in shady areas.

Pour half of the amount of grass seed you need into a drop spreader. Push the drop spreader in side-by-side passings north to south along the targeted area. Add the rest of the grass seed to the drop spreader and apply it in parallel passings east to west across the targeted area.

Spread a layer of 1/8 inch of compost over the grass seed. Water the area to moisten — but not saturate — the soil. Keep the grass seed moist to encourage germination by watering daily. Reduce the amount of watering to every other day when seedlings emerge.