Gardening and lawn care tips for May

Here is everything you need to know to keep your lawn and garden at its best for the upcoming month.

With April almost over, it’s time to start thinking about that all-important month of May. This is a vital time for your lawn and garden and brings with it lots of important jobs. So, we’ve put together a list of all of the things to do to keep your lawn and garden at their best during Maytime.

Regular Mowing

Mowing the lawn is a key part of good lawn care year-round. As we are now in the spring period, you should have started mowing your lawn more regularly. In May, grass growth will increase. By cutting the lawn cut at the appropriate height for the season, you will give the grass plant a better chance to absorb the right nutrients effectively, meaning it will stay greener for longer, minimise weed germination and give it greater resistance to diseases. During warmer months, you should be aiming for a grass cutting height of around 1 inch (25mm) in managing the plant’s ability to withstand high temperatures.

Repairs and Overseeding

In the case of damage from flooding or other potential damages that could have occurred over the winter months, you may need to overseed your lawn (this is sometimes also called re-seeding). These are extreme cases though. Overseeding can also be great for the overall health of your lawn.

Overseeding is the process of spreading new grass seed over existing turf and helps to improve the density of your lawn and enhance its colour. Lawn overseeding is good for lawns that have suffered from drought, insect or disease damage, or that show other signs of decline, such as general bare patches. Overseeding a lawn with newer, improved types of grass is often the best way to thicken the lawn and improve its health and appearance. The new grass is better able to resist damage from drought and disease.

Once the seed germinates, the seedlings must be kept moist with light frequent watering until they are established. As new turf fills in, weeds are choked out, leaving you with a healthier, greener lawn.

Weed Control

Effective spring weed control has a few different factors to consider, including assessing the type of weed growth to establish what type of application to go for and when is the best time for application. In general, nearer the end of May is the prime time to apply applications of selective weed killer on your lawn so using this time to deal with any weed growth is crucial. As mentioned above, regular mowing and overseeding processes can also help with keeping weeds at bay, so provided you follow a proper lawn care regime during the month of May, you shouldn’t find weeds to be much of a problem. Then, come the end of the month and during the beginning of June, you will be able to assess whether or not you need to apply any further treatment.


Often carried out in conjunction with overseeding, aeration is needed when the ground is compacted making it harder for air and water to penetrate the grass root. Aeration is the process of loosening the soil to allow nutrients, water and oxygen to penetrate, and promote deeper and stronger root growth. This can help with compaction, excessive thatch, poor drainage, and moss. There are a few different types of aeration which can be discussed with a lawn care expert based on the requirements of your lawn. These are solid tine aeration, hollow tine aeration, and slit tine aeration.

It is always best to aerate a lawn when there is sufficient moisture in the soil profile. Therefore, it is best to aerate during the late spring which helps to increase the grass health and nutrient uptake leading up to the main growing season. Both spring and autumn are times of the year when the grass plant needs plenty of oxygen, but you should not limit any aeration programme to only these two periods of the year, as the plant will benefit from all-year-round aeration. But in general, if you think your lawn may need a course of aeration, it’s best to get in touch with an expert to start treating the problem during May.

Fertiliser applications

A balanced application of fertiliser is crucial at this time of year. If you haven’t already, May is a great time to apply spring feed if the conditions are suitable. We’ve left this till last as fertiliser generally should be applied after any other lawn maintenance processes are carried out. To see it through the warmer months, your lawn will need the right balance of the correct nutrients: Nitrogen, Potassium, and Phosphate. To learn more, check out this blog post where we go into more detail about each of the essential nutrients and how we target them with our fertiliser application programme.

Giving your lawn the proper nutrients and care it deserves is vital. If you would like help carrying out any of these complex lawn care processes, or even just a professional opinion, find your nearest TruGreen business today to book your free 14-point lawn analysis. Our expert lawn care technicians will assess the conditions of your lawn and come up with a treatment plan to suit you, year-round.

Written by Tom Page, Digital Content Writer