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A. First of all, a tree's root system is very shallow. Ninety percent of its roots grow in the top one foot of soil; in west Austin, even closer to the surface. As the roots grow, they push through the soil.

Here they risk damage from the lawnmower, where nicks can lead to decay and death of the tree. What to do? Avoid soil compaction as much as possible. Then, add a small amount of compost and sand to slowly protect the roots-perhaps adding 1" a year.

You don't want to bury the roots entirely; just slowly add soil around them as protection. The lighter the material, the more you can add. In appropriate areas, consider planting a ground cover that will grow over the exposed roots and protect them, and cut down mowing as well!

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Big Red Sage (Salvia penstemonoides) This native Hill Country plant is a winner! A hot summer bloomer, its attractive red flowers attract hummingbirds and some butterflies.

The blue-green foliage is a nice accent to colorful perennial and annual flowers. This one can get 4-5" tall, so plant it towards the back of the sunny garden.

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It's still okay to plant summer vegetables like sweet potatoes, okra, Southern peas, Malabar spinach, and amaranth. Be sure to keep the seeds moist until germination.

Continue dead-heading for more flower production.

Container plants will benefit from a top dressing of worm castings, which will add nutrients every time you water.

Keep herbs harvested to promote lush growth.

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