Warm-Season Grasses for Ranches

Warm-season grasses grow best in summer heat and go dormant in cool weather. They carry many southern and central ranches through the hottest, driest part of the year, when cool-season grasses slow down.

Key points

Warm-season grasses grow in summer heat and go dormant in cool weather.
Native and introduced types both have roles.
Use local grazing height and rest guidance.
Plan for low-protein dormant forage in winter.
Be patient with new stands.

How warm-season grasses grow

These grasses use a growth pattern suited to heat and bright sun. They start growing late in spring when soil warms, produce most of their growth in summer and slow or stop as nights cool in fall. Feeding value is usually best when plants are young and leafy and declines as they mature and go dormant.

That pattern shapes a whole grazing plan. The forage is abundant in summer but may be low in protein and energy in winter.

Because dormancy is predictable, many producers plan hay cutting and summer stocking around the peak growth window and keep winter needs separate.

Native and introduced types

Native warm-season grasses, such as bluestems, switchgrass, indiangrass and gramas, have been part of rangelands for a very long time. Introduced types, such as bermudagrass, bahiagrass and others, are planted on many improved pastures and hayfields. Both have a place, and the right choice depends on region, soil and your goals.

Ask your extension office or NRCS office for recommended species and varieties for your area.

Mixed stands are common. A pasture that holds both native and introduced grasses may need different grazing times for each, so learn which plants dominate each part of the field.

Natives often suit range and low-input pastures
Introduced types often suit intensive hay and pasture
Check cold hardiness and rainfall needs
Choose varieties adapted to your region

Grazing management

Each species has its own best grazing height and rest needs. Taking it too short for too long weakens the stand, while rest lets it recover. Warm-season grasses can get coarse and stemmy if not grazed or clipped in time, and cattle will avoid the old growth.

Ask local specialists for target heights and timing. They differ by species, and what suits one grass can harm another.

Burning and haying are also used on some warm-season stands. Both have rules, risks and timing needs, so involve local professionals and follow all laws.

Fertility and weeds

Introduced grasses often respond to fertilizer, but a soil test should guide what you apply and when. Native stands usually need less. Weed control usually starts with a healthy, thick stand, then timely mowing, grazing and labeled herbicide where needed. Always follow label directions and grazing restrictions, and keep products away from water.

Be careful with herbicide choices on mixed stands, since a product that controls a weed may also harm the grass you want.

Take a few photographs of each stand in summer and again in fall. A season of pictures shows how plants respond to rest and grazing more clearly than memory does.

Winter feed and supplements

Dormant warm-season forage is usually low in protein, so cattle grazing it in winter often need supplement. Test hay and ask a nutritionist what is short. Watch body condition on the one to nine scale and act early if cattle slip.

Some producers overseed cool-season annuals into warm-season sod to extend the grazing year. Ask extension about methods that fit your stand.

Hay cut from warm-season grasses can vary widely in feed value with cutting date, so test it and plan supplements from the result.

Establishment and patience

Some warm-season grasses, especially natives, establish slowly and need good weed control in the first year. A new stand may need a full growing season of rest before heavy grazing. Follow seed supplier and extension advice on seedbed, planting dates and seeding depth. Cost-share programs may exist through NRCS or FSA, but terms change, so ask directly.

Check seed quality and ask for tested, labeled seed from a reputable supplier.

Common mistakes and what to ask

Mistakes include grazing newly planted stands too soon, overgrazing in dry years, ignoring winter protein shortages and planting a variety that is not adapted. Another is letting stands go rank without any management.

Ask your extension office which species fit your soils, what grazing heights they recommend and how to plan winter supplements.

Records of planting date, seed source, rainfall and grazing dates make it much easier to troubleshoot a poor stand later.

Grazing new stands too early
Letting plants go coarse
No plan for winter protein
Planting a poorly adapted variety

When to get help: Ask your extension agent or NRCS office which warm-season species and varieties suit your soils and rainfall, and a nutritionist how to supplement dormant forage. Contact FSA or NRCS about program help, since terms change.

Sources and further reading

Organization homepages are linked so you can search them for current guidance on this topic.

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