North Alabama Lawn Watering Guide
From the lawn and property care guide.
Lawn and property care guide · North Alabama
Drought, heat stress and dormancy
How to tell a dormant lawn from a dead one, what heat actually does to turf here, and what is worth doing when the water runs short.
Two different browns
Winter dormancy and drought dormancy are not the same thing
A warm-season lawn goes brown in winter because the soil is cold, and it may go brown in summer because the water has run out. Both are dormancy, and only one of them is worth doing anything about.
Winter dormancy is normal and complete. Bermuda, zoysia, centipede and St. Augustine all stop growing and go tan or straw colored once the soil cools, and green back up as it warms again in spring. Nothing is wrong, nothing needs feeding, and the lawn needs almost no water at all because it is not growing and it is not losing much.
Summer drought dormancy is a defensive move. The plant stops putting energy into leaf and holds what it has in the crown and the roots. Bermuda and zoysia are good at this and can sit there for several weeks. Tall fescue is not - it is the least drought tolerant of the grasses grown here and it tends to thin rather than to wait.
The limit matters. A long, severe dry spell with no water at all eventually starts killing crowns, and at that point the lawn is not dormant any more. An occasional deep soak through a serious drought is what keeps a dormant lawn on the recoverable side of that line, and it does not need to be much.
Telling them apart
Is it dormant, or is it dead?
This is the question everybody asks in August and again in January, and there are two reliable checks.
That last one is the definitive test and it costs nothing but patience. It is also why reseeding a drought-browned lawn in August is usually premature: a good deal of what looks gone comes back on its own once the weather breaks.
- Dormancy is even. It goes across the whole lawn, or across everything with the same amount of sun. Damage has edges - circles, straight lines, or a boundary that follows nothing on the ground.
- Pull a handful. Dormant grass resists and the crown at the base is firm and pale. Dead grass pulls out easily and the crown is brown and papery.
- Look at where. Drought browns the high, dry, sunny areas first - slopes, the strip along the drive, anywhere over shallow soil. Everything browning at once in October is dormancy.
- Watch what happens after rain. Dormant grass greens up from the base within a week or two of a real soaking. Dead grass does not change.
Through a heat wave
What actually helps when it is a hundred degrees
Less than people expect, and most of it is restraint. The lawn is trying to survive, not to grow, and work that pushes growth is work against it.
It is also worth mentioning the mower blade, which people never connect to heat. A dull blade tears rather than cuts, and a torn end dries out and browns far faster on a hot lawn than on a comfortable one.
- Raise the mowing height a notch. Taller leaf shades its own soil, holds moisture longer and supports deeper roots. It is the single most useful thing available
- Water deeply and early rather than switching to daily sprinkling. The pattern that built deep roots is the one that gets it through
- Keep traffic off stressed turf. A lawn that cannot grow cannot repair a worn track either
- Do not feed a lawn that is under heat stress. Pushing leaf on a plant that is short of water makes the problem worse, and burn is far more likely on hot dry soil
- Do not aerate, dethatch or scalp. All three ask the lawn to heal, which is exactly what it cannot do now
- Do not reseed. Seed germinating into a heat wave is money spent on nothing
Restrictions
When you are asked to use less water
Local restrictions come first, always, and a warm-season lawn is better able to sit through one than most people fear.
If your water system has asked for reduced use, follow that even where a lawn would prefer otherwise. Bermuda and zoysia will go dormant, hold, and green back up when conditions allow. A restricted summer is rarely the end of a lawn, and it is certainly not worth ignoring a restriction over.
What helps during one is the same list as above: raise the height, keep traffic off, and stop feeding. If a limited amount of water is available, put it on in one deep soak rather than spread thinly across every day - a small amount split seven ways evaporates before it reaches anything.
Newly laid sod and newly seeded areas are the exception worth planning around. Those cannot go dormant and survive, which is a strong argument for not starting a new lawn going into a dry summer.
Afterwards
Recovery, and what it tells you
When the rain comes back, watch which parts of the lawn recover and which do not. That map is the most useful thing a drought produces.
Areas that green up within a fortnight were dormant. Areas that stay brown after three weeks of normal weather were something else, and now is the time to find out what - shallow soil, compaction, a sprinkler zone that never reached them, or damage that was there before the drought and got blamed on it.
Recovery is also the right moment for the work that was postponed. Aeration, overseeding, repairs and feeding all belong to a lawn that is growing again, not to one that is holding on. If a season of drought has left a property looking rough, an estimate visit is free and the sequence of work matters more than the effort - request one.
Answers
Questions about drought and dormancy guide
Is my brown lawn dead or dormant?
Dormancy is even across the whole lawn and damage has edges. Pull a handful: dormant grass resists and the crown is firm and pale. The definitive test is what happens after a real soaking - dormant grass greens from the base within a week or two.
Should I stop watering when the lawn goes dormant?
In winter, yes - a dormant warm-season lawn needs almost nothing. In a summer drought, an occasional deep soak protects the crowns, because a long dry spell with no water at all eventually starts killing them.
Should I mow higher during drought?
Yes. Raising the deck a notch is the single most useful thing available. Taller leaf shades its own soil, holds moisture longer and means each cut takes less off a plant that is already stressed.
Can I fertilize a heat-stressed lawn?
No. Pushing leaf on a plant that is short of water makes the problem worse, and fertilizer burn is far more likely on hot, dry soil.
What should I do during a watering restriction?
Follow it. Raise the mowing height, keep traffic off, stop feeding, and if a limited amount of water is available put it on in one deep soak rather than spread thinly across every day.
How long can Bermuda stay dormant in summer?
Several weeks, in most cases, and it greens back up when water returns. Tall fescue is far less tolerant and tends to thin rather than wait.
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Mowing Heights and the One-Third Rule
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Why a Lawn Turns Brown, Yellow, Thin or Patchy
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Grass Types for North Alabama Lawns
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HRH Lawn Care Services
Not sure what your property needs?
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