All Dahlia tubers should be planted by now.
As the foliage dies down, lawn areas that are naturalized with bulbs, can now be cut.
Along border edges, Sweet Alyssum can be sown where spent Pansies have been removed.
Be sure to keep Sweet Peas well watered if the season is dry.
Begin thinning surplus fruit set on your fruit trees.
Continue your regular fruit tree spray schedule.
Cultivate soil around roses regularly.
Cultivating your soil kills weeds and aerates it as well.
Cut back unwieldy growth on wistaria vines.
Cut Roses just before the bloom has fully expanded, early morning or in the cool of the evening.
Delphiniums should be well staked.
Finish off the garden with well trimmed lawn edges along beds and paths.
Finish up pruning of spring-blooming shrubs by the end of the month.
Gardenias and Azaleas that have flowered indoors, can be sunk in a corner of the garden.
Gather rose petals for making potpourri, or cut already open flowers for drying.
Give Fuchsias plenty of water.
It is safe now to set tropical Water-Lilies in garden pools and ponds.
Keep an eye on your roses for diseases, insects and suckers.
Last call to sow Alyssum, Bachelor Buttons and Zinnias for late bloom, is the end of this month.
Make another planting of Gladiolus and feed your earlier plantings.
Make some time to enjoy the beauty of your garden.
Pinch bedding plants to encourage branching.
Plan for succession crops as early ones are harvested in the vegetable garden.
Plant another row of lettuce, before the intense heat of summer arrives.
Prune one-third of older canes from rambler roses as blooms fade.
Prune suckers from tomato plants.
Regularly fertilize plants growing in planters, tubs and window boxes.
Removing spent blooms from roses will keep the beds tidy.
Softwood cuttings can be taken from May till August, save some room in the cold frame for them.
Start perennials and biennials from seed.
Start drying herbs and perennials for winter use.
Thin seedlings to ensure plants have plenty of room to grow.
This is a good month to prune Dogwoods, correct shaping now will encourage a fine display for spring.
To make cutting easier, deciduous hedges should be sheared before new growth hardens.
Top leaf buds should be removed from Chrysanthemums to encourage bushy growth.
Why not plant some herbs by the kitchen door.
You can remove any spent flower heads from Lilacs and Rhododendrons.
Zinnias like deep cultivation and wood ashes worked in their soil.