In the UK, it is recommended to cut your lawn regularly, usually about once a week during the growing season.

The ideal height for cutting your lawn depends on the type of grass you have, but in general, a good rule of thumb is to cut the grass to a height of about 5-7 cm.

Cutting your lawn too short can be harmful, as it can stress the grass and make it more susceptible to disease and pests. Additionally, cutting the grass too short can also make it more difficult for the grass to photosynthesize, which is essential for healthy growth.

On the other hand, cutting your lawn too infrequently can also be a problem, as the grass can become too tall and create a hiding place for pests and diseases.

It's important to find the right balance between cutting your lawn too frequently and cutting it too infrequently, and to follow the recommended guidelines for your specific type of grass.

In general, the best time to cut your lawn in the UK is during the spring and summer when the grass is growing quickly. During the fall and winter, you may only need to cut your lawn once a month, or even less frequently, depending on the weather conditions and the type of grass you have.