Split bluestem

Year-round

Split bluestem is a small warm season bunchgrass that handles Hot Springs conditions well once it has full sun and soil that drains fast. It is not a plant that needs pampering. The main way to lose it is wet feet in heavy soil.

• Give it full sun, at least 6 hours a day. In part shade the clump stays loose and leans instead of standing upright.
• Plant it in well-drained, sandy or rocky soil. Heavy clay that holds water after rain is the top reason this grass fails.
• Water new plants regularly through their first summer, then back off. Once established it wants dry to average soil and very little extra water.
• Each clump stays 1 to 2 feet wide and grows 2 to 4 feet tall, with wispy silver seed heads rising above the leaves in fall.
• Space new plants 18 to 24 inches apart so clumps have room to fill out without crowding each other.
• It grows fine in lean, low fertility soil and does not need feeding. Rich soil just makes the stems floppy.

Fall

Fall is when split bluestem earns its name. Feathery, silver seed heads open above the foliage from late summer into November.

• Bloom and seed head display runs from late summer into November, with the plumes catching afternoon light and holding their color into fall.
• The foliage starts turning copper and tan as nights cool. That is normal dormancy setting in, not a sign of trouble.
• Leave the seed heads up if you like the winter look. Cut them off before they shatter if you would rather limit how much the clump self-seeds.
• First frost in the Hot Springs area typically lands in late October to early November, and this grass is unaffected by it.
• No cutback needed now. Wait for late winter or early spring so the standing growth can protect the crown through the cold months.

Deadheading the seed heads before they shatter is a simple way to keep the bed looking neat if a full self-seeding look is not what HOA-conscious neighbors expect.

Winter

Winter is dormant season. The clump goes tan and stands still through the cold, and it does not need any help getting through an Arkansas winter.

• The dormant tan clump can stay standing all winter. That is normal, not dead, and many gardeners leave it up on purpose for winter texture.
• This species' broader range runs as far north as New Jersey, so a Hot Springs winter in zone 8a is well within what it handles without any covering.
• Do not cut it back yet. Wait until late winter or very early spring, right before new growth starts.
• Standing dormant growth also gives small birds and insects a place to shelter through the cold months.
• If the clump is leaning or matted down after ice or heavy snow, a light rake through it in late winter tidies it up before the spring cutback.

A tan, upright clump reads as an intentional winter feature rather than a neglected patch, which keeps a front bed looking HOA-friendly even in the off season.

Spring

Spring is cutback season. Cut the old growth down before new blades come up, then be patient, this grass is slow to green up.

• Cut the whole clump back to about 4 to 6 inches before new growth starts. In zone 8a that usually means sometime in March, ahead of the spring flush.
• New shoots take their time. Do not judge the plant by early April, it will not look like much until nights are reliably staying above 50 degrees.
• If a clump has gone thin or hollow in the middle after a few years, early spring is the time to dig and divide it.
• Skip the fertilizer. This grass is built for lean soil, and feeding it just leads to weak, floppy stems later in the season.
• Check drainage after spring rain. Standing water around the crown is a bigger risk to this plant than any cold snap.

A clean, low cutback in early spring keeps the bed looking tended right as the growing season starts, which fits an HOA-friendly front yard.

Summer

Summer is the easy season. Once established, this grass shrugs off Arkansas heat and humidity and mostly takes care of itself.

• Established clumps handle summer heat and humidity without extra watering. Save the hose for a first year plant or a real dry spell.
• Overwatering in summer is more likely to cause problems than underwatering. Soggy soil in hot weather can rot the crown.
• The clump fills out through summer and starts sending up its first seed stalks late in the season.
• No need to fertilize or mulch heavily around it. This is a plant that does better left alone in average or lean soil.
• If a clump is flopping open in the middle of summer, that usually means too much shade or soil that is richer and wetter than it wants.