There are several tasks that can be done in the garden during May, depending on your location and climate. Here are a few suggestions:

1. Plant warm-season vegetables: May is typically the time when the last frost has passed in most areas, making it safe to plant warm-season vegetables such as tomatoes, peppers, cucumbers, and squash.
2. Weed and mulch: As temperatures start to warm up, weeds will begin to grow faster. Take time to remove any weeds and add a layer of mulch to help prevent new weed growth, conserve moisture, and regulate soil temperature.
3. Fertilize: May is a good time to fertilize your garden. Add a slow-release fertilizer to your soil or use compost to provide your plants with the nutrients they need to grow strong and healthy.
4. Prune: Prune any dead or damaged branches from trees and shrubs, and cut back any overgrown or leggy plants.
5. Transplant seedlings: If you started seeds indoors earlier in the year, May is a good time to transplant them into the garden.
6. Water: As temperatures start to rise, make sure your plants are getting enough water. Water deeply and less frequently to encourage deep root growth.

By taking care of these tasks in May, you can help ensure a healthy and productive garden throughout the growing season.