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Poa arachnifera

Texas Bluegrass

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Description

This sod-forming native American bluegrass is the darkest green, most drought-tolerant grass I have ever known or grown. Its species name, Poa arachnifera, comes from its spider web like silky flowers. Spreading from underground rhizomes, its classic bluegrass foliage grows from 6-12 inches high. It is shorter and slower growing in dry sites but can be aggressive in fertile moist soils with lots of fertilizer. Its strong growing habit is desirable in high-trafficked meadows or large-scale plantings. The ability to repair itself is a good trait in high-use garden settings.

The foliage of Texas bluegrass is a rich dark green. Soft, yet durable, it feels great under bare feet. This is unusual for many drought-tolerant grasses and sedges. The foliage is evergreen in most western climates with little effect from the cold, until temperatures drop into the 20's. With a hard freeze, the foliage blanches tan to winter russet, but greens back quickly with a cut back. Established colonies will go summer dormant without summer irrigation or rainfall, but greens up quickly if cut back and watered.

Texas bluegrass has showy flowers that rise above the foliage in late April to early May. The flowers are delicate panicles that nod 8-12 inches above the foliage. Unlike most grasses though, the flowers do not mature to a showy seed head. The resulting flowers do not usually produce any seed at all, preventing Texas bluegrass from spreading where it's not wanted and is why Texas bluegrass is never offered as seed. The old flowers fade to a whitish vestige of their former self and then fade into the foliage. I usually cut the flowers off with a few inches of foliage, when the flowers are no longer attractive.

Texas bluegrass makes a fine natural lawn or base meadow grass. Its ability to grow in a wide variety of soils and to thrive in sun or shade only adds to its appeal. It's great with bulbs and flowering accents and can be mowed to 1.5-2 inches for paths or sports turf. It may be too aggressive for small gardens. But properly grown (ie, regularly trimmed, kept on the drier side, and not over watered) it can find many uses in meadows large and small. In large plantings, the flower displays are breathtaking. Texas bluegrass is also useful as a filler between clumps of large flowering grasses.

John's Notes

Planting Tips

Since Texas Bluegrass is a spreading/creeping grass, it is best planted from bare-root divisions, small pots, or plugs. Spacing is usually 1 inches on-center but can be stretched 18-24 inches on-center if budgets are tight. Plants can be planted as close on-center as budget permits. Texas Bluegrass can be planted any time of year in most climates but is best planted in fall or early spring.

Keep newly planted plugs well watered and do not allow them to dry out until plants are well-rooted (usually takes 2-4 weeks, depending on the time of year). Fertilize new plantings every 4 weeks. After rooting, mow new plantings every 4-6 weeks until plantings fill in.

Maintenance Advice

Cut Texas bluegrass down in fall to stimulate new growth in cooler winter months. Cut down from 1-2 inches as desired. I also cut Texas bluegrass after flowering to remove the unsightly heads and reduce the biomass before the hot summer months. Over-watering may produce root rot and poor stunted growth. Rust, a common ailment of Kentucky bluegrass, is rarely seen in Texas bluegrass.

Slope Usage

Texas bluegrass is not for hot, steep, sunny slopes. It might find use on shadier slopes with sufficient summer water.

General Details

Plant Type

Grass, Poaceae

Native Region

Texas, USA

Seasonality

Cool-season, evergreen

Height

Foliage grows 6-12 inches tall, flowers 8-12 inches above the foliage

Width

6+ inches

Alternate Names

N/a

Aesthetic Form

Landscaping Value

Groundcover, natural lawn

Foliage

Soft, narrow blue-green leaves

Flower Form

Showy, silky web-like blossoms dry to a whitish tan

Bloom Cycle

Spring to summer

Growth Habits

Creeping, spreads into dense mats via strong rhizomes

Plant Pairings

No Available Information

Care & Maintenance

Watering Needs

Low, water occasionally in the summer

Soil Preferences

Wide adaptability from sand to clay

Sun Exposure

Full sun, tolerates partial shade

Winter Heartiness

25° F, USDA zones 8-9

Desert Adaptability

No Available Information

Costal Adaptability

No Available Information

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