May gardening jobs If you didn’t prune your lavender at the end of summer you can do that now to stop it going leggy. If you’re going to do lawn care like aerating and reseeding do this by the end of the month. Apply nitrogen-rich summer lawn feed to encourage leaty growth. You can Plant out dahlia tubers and cannas after all risk of frost has passed and tie in the new shoots of climbing plants like clematis and wisteria to their supports. As the weather warms up it’s a good time give everything