How to Revive a Hard Dry Lawn
Just to clarify, we are not talking here about repairing burnt, dry, dormant or brown lawns that have been damaged or killed by the dry weather. This is just about seeing if we can bring the lawn back to a green healthy state as quickly and completely as possible. You should consider current river and reservoir levels, the environment and any water restrictions before watering. Rarely is this necessary but it may be applicable to your area this year.
Of course, watering to revive the lawn may not work completely in which case some or all of the lawn is dead. Extended dry weather on heavily used or older lawns sometimes means recovery may not be 100% successful. Undertaking this revival method sooner rather than later is always wise as the longer the lawn remains dry and brown the less chance it has of coming back from dormancy.
The process can be as simple as just adding water. If you lawn is fairly new or has been well maintained with light use you may only need to run the sprinkler for an hour a day for a couple of sessions. If that works without run-off and the lawn recovers uniformly then well done for maintaining a great lawn. If however you get run-off or pooling in any more than a few places then follow this program for best results. The benefits are:
- More problem areas will come good as well as easy to revive ones
- It works faster than by just watering
- You’ll use less water
- It’ll stay greener longer
We are all aware of the potential for flooding after extended dry periods: the soil can't absorb heavy rain which runs off rapidly, overflowing rivers and ending up flooding residences and businesses. To avoid run-off when reviving the lawn we need to take it slowly so as not to cause run-off and waste water.
Watering Day 1
Start to water by sprinkler in any one area for just 15 minutes. If water starts running off before 15 minutes is up, then move the sprinkler after less time to another area and then come back to it as you rotate your watering around the lawn.
Aerating Day 2
If you have some kind of aerator or spiker then on day 2 run over the lawn with it to just prick the surface, don’t force it. Even tiny holes just a few millimeters deep will help the water penetrate your lawn. This will help speed the process up and though very beneficial is not essential.
A Cunning Plan
Nothing to do with Blackadder but a customer cleverly attached diving weights to his rolling aerator as in the top image. This meant he could pull it rather than push and still manage sufficient aeration as required for a hard lawn. Having tried it ourselves we can confirm it is easy to set-up, works a treat and is super-fast to cover a lawn even the size of a tennis court. Any heavy weight up to a couple of kilos that can be safely and securely attached should do.
Watering Day 3
Repeat day 1 watering and try to increase the watering time a little to around 30 minutes in any one spot.
Wetting Agent Day 4
Adding a wetting agent at this stage really helps water penetrate hard to wet soils and increases the amount of water that the soil can hold. One application on day 4 followed by a second one after 2 weeks will work wonders and is very easy to do with a watering can or sprayer.
To improve the penetration of the wetting agent go and run over the lawn again with the aerator. It'll still be worth pulling it if weighted and may only penetrate a few centimeters. Valuable all the same particularly where run-off and compaction is worst.
Watering Day 5
If you’ve managed some aeration and added the wetting agent, you should now be able to water for an hour in any one spot. It is also important at this stage to switch to watering in the morning.
You should now start to see some green shoots as recovery begins. You will need to continue to water weekly if there is no rain to stop the lawn reverting to its dormant state. See How to Water the Lawn
Feeding Week 3
By now you’ll be seeing a green recovery so assist the lawn by providing much needed nutrients. If this fits in with your feeding program apply a granular feed, or if you’re between summer and autumn feeds apply a liquid feed. This will give the grass the energy to grow new leaves to replace the dead brown ones that are still present.
Make sure to scarify the lawn if needed. If this is not required a good raking to remove dead brown grass leaves followed by the autumn feed is all that should be required. Oh, and aerate some more by all means. You just can’t over do it.