Every single lawn I have ever worked with has been different to every other. So when a homeowner asks “How often should I apply lawn treatments?” I tend to be a little cautious with my answer – until I’ve learned more about the lawn. Generally though, 5 lawn treatments per year are ideal for most lawns.
The condition of a lawn depends on lots of different factors.
The current condition of the lawn
The soil beneath it. How deep is it, what’s its composition?
The grass species within the lawn. Robust ryegrasses or shallow rooted fine grasses?
Sunlight and shade
How much wear and tear the lawn has and whether it’s used by pets and children
Mowing regime – very close mown lawns need more treatments than slightly longer grass
The area beyond the garden – could seeds blow in from neighbouring fields? Is there a lot of pollution from traffic? Is it visited by wildlife?
Of course that means that lawns in different parts of the UK, That’s why, although I love reading lawncare articles online and in books, I think it’s important to make decisions based on plant physiology, local knowledge and experience. The clay soils around Belfast and the high average rainfall in Northern Ireland bring a unique blend benefits and challenges for a lawn.
For a reasonably healthy lawn with a medium amount of foot traffic, no dogs, plenty of sunshine and deep strong soil I usually recommend five treatments per year. Each one tailored to the individual lawn and the seasonal needs of the grass.
Midwinter lawn treatments
Midwinter is when the dreaded moss is at its most vulnerable. If you can treat moss in January, you will have a much better chance of controlling it.
The midwinter treatment I recommend is an application of winter feed containing plenty of Iron. Iron gives grass a lovely deep green colour and it burns moss plants.
Keeping hedges trimmed will help control moss in the lawn
If moss is a big problem in your lawn, it could be caused by shade. Between November and February, the time is right to prune trees and cut hedges allowing more light into the lawn and discouraging moss.
Spring lawn treatments
As the soil warms up and the days get longer, the grass will start springing into life. Winter rain will have washed many of the important plant nutrients out of the soil. A balanced slow release fertiliser will help the grass recover from winter. Slow release means that the nutrients won’t be washed away in the first downpour of rain.
Weeds will be growing fast too. Professional herbicides work when they are drawn into the leaves and roots of the plants. The faster the plant is growing, the faster the sap flows and the quicker the herbicide will be absorbed and get to work. So spring is a good time to control common weeds.
Early summer lawn treatments
May – July is when your lawn is growing fastest. Regular mowing is essential to keep it tidy and encourage the growth of side shoots. Side shoots or tillers, give the sward that lovely velvety texture and help the lawn cope with the wear and tear of summer usage.
Some stubborn weeds need a second dose of herbicide before they get the message and timing is all important. Leave it too late and the weeds may have recovered from the first dose and regained their strength. 6-8 weeks after the first weed control treatment is the optimum time for the follow up application.
By now, the spring feed will be exhausted too. Time to top up the levels of soil nutrients because May – July is when your grass is working hardest for you.
Late summer lawn treatments
By august or September – depending on the weather we’ve been having – your lawn will seem to be growing slower. But don’t be fooled by what you can see above the ground. Below ground, the roots know that winter is on its way and they are growing like billio to make sure they can protect the plant against winter frosts.
In late summer I like to apply a seaweed tonic to help the grass recover from the stress of summer. Seaweed contains a lot of iron which gives the lawn a lovely green colour and helps it to harvest energy from the sun so that those roots can grow. It’s especially beneficial if the lawn is regularly used by children and pets.
A general fertiliser will make sure that the plants are well fed and healthy and better able to resist diseases such as redthread and fusarium. Both of these are more prevalent in autumn.
Slower grass growth tends to highlight the presence of any weeds too. As part of our late summer lawn treatment, we’ll include a free herbicide application.
It’s time to step back and assess the lawn’s performance during the year. Were there any problems that might need to be addressed with separate renovations?