Landscaping Services in Dallas, TX

Landscaping in Dallas

Dallas landscaping has an obligation that most cities do not impose: it has to keep the house standing. Blackland prairie clay moves enough with moisture that soil management around the foundation is a structural matter, and everything else in the design has to work around it.

Foundation Watering Comes First

North Texas blackland clay is among the most expansive soil in the country. It swells when saturated and shrinks substantially when dry.

The mechanism: in a dry August the soil around the slab perimeter contracts and pulls away, and the unsupported edge of the foundation drops. Because trees, shade, downspouts and paving dry the soil unevenly, that movement is differential — one corner drops while another does not. Differential movement is what cracks slabs, jams doors and breaks under-slab plumbing.

What good practice looks like:

• Soaker hose 12-18 inches out from the slab, not against it.
• Consistent, frequent, short cycles during dry periods rather than occasional heavy soaking. Steady moisture is the goal.
• Evenly moist, not saturated. Overwatering causes heave, which damages the foundation just as effectively.
• Grade away from the house — roughly six inches of fall over the first ten feet. On older Dallas properties, decades of added mulch and raised beds have frequently reversed this.
• Downspouts discharging well away from the foundation, not into a bed against the wall.
• Watch mature trees. A large oak, elm or pecan within its canopy radius of the house draws enormous water from the soil and is a common cause of localised drop. Root barriers are sometimes warranted.

A landscape designer working in Dallas who does not raise foundation moisture unprompted is not thinking about the right problem.

Blackland Prairie Soil

Dallas sits on deep, dark, highly alkaline clay — some of the most fertile soil in the country agriculturally, and difficult in a garden.

• Alkaline pH, typically 7.5-8.2, locks up iron and causes chlorosis in plants not adapted to it. Choose adapted plants rather than fighting the pH with amendments, which is a losing and expensive battle.
• Poor drainage. Clay holds water. Plant high, on mounds, and never dig a hole in clay, backfill it with rich compost and plant into it — you have built a sump.
• Amend broadly and shallowly across a whole bed rather than in individual holes, so roots are not confined.
• Do not add sand. Sand mixed into clay approaches concrete.

Turf

Bermuda — the DFW default for full sun. Handles heat and drought, recovers from wear, and spreads aggressively. Needs six or more hours of direct sun and goes dormant brown from November to April. Some people overseed with ryegrass for winter colour; it is optional and adds water demand.

St. Augustine — tolerates the partial shade under mature trees, which Bermuda will not. Needs more water, and is vulnerable to chinch bugs in hot dry weather, take-all root rot in wet springs, and brown patch in autumn.

Zoysia — denser, more drought-tolerant than St. Augustine, slower to establish and more expensive. A good compromise where budget allows.

Regardless of species, water deeply and infrequently. One inch a week in one or two applications drives roots down. Daily light watering produces a shallow-rooted lawn that fails in the first real drought, and it is prohibited under Dallas restrictions anyway.

Watering Restrictions

Dallas Water Utilities has maintained year-round conservation measures:

• Twice-weekly maximum for automatic irrigation systems.
• No watering between 10am and 6pm from April through October.
• Additional stage restrictions during drought.
• No irrigation during or immediately after rain — a functioning rain and freeze sensor on the controller is required and is worth checking.

Practically, a landscape that needs daily water is not viable here. Design for twice-weekly deep irrigation and choose plants accordingly.

A Palette That Works

North Central Texas natives and adapted species handle alkaline clay, heat and drought.

Trees — Cedar Elm, Bur Oak, Chinquapin Oak, Texas Red Oak, Mexican Plum, Desert Willow, Texas Redbud. Avoid Silver Maple and Bradford Pear, both of which fail structurally.

Shrubs — Texas Sage, Dwarf Yaupon Holly, Agarita, Flame Acanthus, Rough-leaf Dogwood, Elbow Bush.

Perennials — Autumn Sage, Turk's Cap, Gregg's Mistflower, Black-Eyed Susan, Purple Coneflower, Blackfoot Daisy, Zexmenia.

Grasses — Little Bluestem, Gulf Muhly, Mexican Feather Grass, Inland Sea Oats for shade.

Texas Superstar and Earth-Kind designated plants are trialled specifically for this region and are a reliable starting list.

Costs in Dallas

Timing

• Autumn is the best planting season for trees, shrubs and perennials. Warm soil and cooling air let roots establish through a mild winter before summer stress arrives.
• Spring works but compresses establishment into a short window before June heat.
• Never plant in summer unless you are prepared to water daily through establishment, which conflicts with restrictions.
• Prune trees in winter dormancy. Oak wilt is a genuine risk in North Texas, and pruning oaks between February and June is discouraged. Paint any oak wound immediately regardless of season.

Tips for Dallas Homeowners

1. Run soaker hoses at the foundation through drought. It is structural maintenance, not gardening.
2. Check that grade falls away from the house. Decades of added mulch often reverse it.
3. Never mix sand into blackland clay.
4. Do not prune oaks February through June because of oak wilt.
5. Design for twice-weekly deep watering, which is both the rule and better horticulture.