No Mow May is one of the most talked about garden movements in the UK right now. Every May the same question comes around. Should I actually stop mowing? And if I do, what happens next?
No Mow May started as a campaign by Plantlife to encourage homeowners to let their lawns grow for the month and give wildflowers and pollinators a chance to establish. It has grown considerably since then and what was once a niche conservation idea is now something millions of UK gardeners are aware of. The question is no longer whether a no mow may garden is a good idea. It clearly is. The question is how to do it well.
What Actually Happens to Your Garden During No Mow May
In the first two weeks, not much that is visible. The grass grows and if you have a very neat lawn this can feel uncomfortable. Stick with it.
By week three, if your soil has any wildflower seed bank, you will start to see what is there. Common lawn wildflowers like clover, selfheal, bird’s-foot trefoil, daisies and dandelions will begin to flower. These are often dismissed as weeds but they are among the most valuable plants for pollinators in a UK garden. A single dandelion can support over 100 species of insect.
If you have been mowing a lawn very short and frequently for years, the seed bank may be depleted and you may see less. This does not mean No Mow May has failed. It means the soil needs time to recover and the seeds need time to establish.
By the end of May a well-established lawn can be genuinely beautiful. Grasses at their natural height have a movement and texture that a closely mowed lawn never achieves, and a lawn studded with clover and selfheal in flower has a charm that is hard to argue with.
Which Wildflowers to Expect
The species that appear will depend on your soil type, how the lawn has been managed previously and your local seed bank. The most common and most valuable are:
Clover. White and red clover are both outstanding for bumblebees and honey bees. If you see nothing else in your No Mow May lawn, clover is worth having.
Selfheal (Prunella vulgaris). A low-growing perennial with purple flower spikes that appears in most lawns. Excellent for bees and requires no intervention to establish.
Bird’s-foot trefoil (Lotus corniculatus). Bright yellow flowers, important for many butterfly species including the common blue. Grows well in shorter grass so appears early in the month.
Daisies. Often the first to flower and one of the most recognisable. Good for hoverflies and short-tongued bees.
Dandelions. Ecologically one of the most important plants in a UK garden in spring. If you can make peace with them, leave them.
How to Make Your No Mow May Garden Look Intentional
The most common reason people abandon No Mow May halfway through is that the lawn starts to look neglected rather than considered. The solution is edges.
Keeping the edges of the lawn neatly trimmed throughout May makes an enormous difference to how the longer central area reads. A sharp edge signals intention. Without it, an unmowed lawn looks like an oversight.
A mown path through the centre or around the perimeter of the longer grass also helps. It gives the garden structure and makes the longer grass look like a deliberate design decision rather than a maintenance gap.
What to Do in Your Garden When No Mow May Ends
This is the part most No Mow May guides skip over. If you mow everything back to a conventional lawn height on 1 June, you lose most of what you gained. The wildflowers will not have had time to set seed and the following year you will start from scratch.
The better approach is to cut in stages. Cut a third of the lawn back to normal height in early June, another third in mid-June and the remainder at the end of June. This gives the wildflowers time to set seed, keeps the garden manageable and means you go into July with a lawn that has genuinely benefited from the month rather than simply recovered from it.
A scythe or strimmer works better than a rotary mower for the first cut back. Collect and remove the cuttings rather than leaving them to mulch back into the soil, as this would add nutrients that favour grass over wildflowers.
Taking Your No Mow May Garden Further
No Mow May is a good starting point but the gardens that benefit most from a wilder approach are those where it is designed in from the beginning rather than added as an annual experiment.
A permanent wildflower meadow area, even a small one, integrated into a considered garden layout gives you the ecological benefit year-round and looks deliberately beautiful rather than temporarily unkempt. Combined with a bespoke planting scheme that works with your soil conditions and light levels, it becomes one of the most rewarding and lowest maintenance parts of the garden.
If you are thinking about redesigning your garden to incorporate wilder planting, our online garden design service covers planting schemes designed around biodiversity and year-round interest. Book a free consultation with the team to talk through your garden.