There is no need to mow the lawn as frequently this month. Growth has slowed down.
It is wise to build supports for floppy plants and vines in the garden, it makes it easier for them to grow.
Now that the soil is warm and things are starting to grow you should apply both mulch and fertilizer thoroughly.
When planting annuals you should loosen up the roots beforehand, this way it will encourage a stronger growth.
Tie in climbers and climbing roses, that will help them growing.
New rosebushes should be planted now, before their growth starts and their buds swell.