Bush Muhly

Year-round

Bush Muhly is an airy, see-through bunchgrass that thrives on Phoenix neglect. Give it full sun, fast-draining decomposed-granite soil, and water it deep but rarely once it is settled in.

• Plant in decomposed-granite or gravelly native soil in full sun, and skip fertilizer entirely because desert natives like this one weaken in rich soil.
• Water deep and infrequent, soaking the whole root zone to about 12 inches and then letting it dry out, rather than short daily sprinkles.
• Top the bed with decomposed-granite or gravel mulch, not wood bark, which looks out of place in a desert yard and holds moisture the wrong way here.
• The number one local killer is overwatering, so when in doubt, wait a few more days before you water an established plant.

A clean decomposed-granite bed with this grass spaced as a soft, tidy accent reads as intentional desert xeriscape, which is the expected HOA-friendly Phoenix front-yard look and helps you avoid a violation letter.

Fall

Fall is the prime season in Phoenix. The heat breaks, the plant is still fresh from monsoon growth, and this is the best time to plant a new Bush Muhly and to tidy an existing one.

• Plant new Bush Muhly in October or November so the roots settle in through the mild winter well before next summer's heat, and never plant it in the May-to-July heat.
• Water a brand-new fall planting deeply about once a week for the first few weeks, then stretch the gap as it establishes.
• After the reddish bloom fades, comb out or lightly trim the dead inner stems to keep the clump looking neat.
• Top off the decomposed-granite mulch around new plantings so the bed looks finished going into winter.

Cutting back the spent bloom and tidying the clump in fall keeps the grass reading as a maintained, intentional planting rather than a weedy tumble, which is what keeps a front yard on the right side of HOA-friendly expectations.

Winter

Winter in the Phoenix core is a mild cool season, not a hard dormancy. Bush Muhly needs very little from you now beyond the occasional deep drink.

• Water only during long dry winter stretches, giving one deep soak every 3 to 4 weeks at most, since the gentle Dec-to-Mar rains often cover the plant's needs.
• Leave the clump standing over winter, since it is frost-hardy in the Phoenix core and the dry stems give a little cover for the crown.
• Hold off on any fertilizer or rich amendments, which this grass does not want in any season.
• Save the real cutback and tidy work for fall rather than mid-winter, and just knock out any obvious dead stems if the plant looks messy.

Spring

Spring is a mild warming stretch for Bush Muhly, not its big show. Ease off the winter watering as the days heat up so the plant hardens off before summer.

• Taper the last of the winter waterings through March into May, giving one deep soak every 2 to 3 weeks only if the season is bone dry.
• Early spring is a weaker secondary planting window, so if you missed fall you can still set a new plant out in warm-but-not-hot March weather.
• Refresh any thin spots in the decomposed-granite mulch now while the weather is comfortable to work outside.
• Do not start heavy summer-style watering yet, since the warm-season growth and reddish bloom come later with the monsoon.

Summer

Summer is the stress season, but for Bush Muhly the monsoon is also when it wakes up and puts on its reddish haze of bloom from July into October. Ride the rains and do not drown it.

• In the dry, brutal June foresummer, give a young plant in its first summer or two an occasional deep soak, but leave a well-established clump alone.
• Once the monsoon rains start in July, let the storms do the watering and only add a deep soak during long dry gaps between downpours.
• Watch for the reddish flowering haze from July through October after the rains, which is the plant working normally, not a sign of stress.
• The biggest summer mistake here is watering on top of monsoon rain, which rots roots, so always check that the soil has dried before you add any.