Homes & Gardens: What grows where in Halton?

Even without the drought that affects Ontario from time to time, summer heat can be tough on plants. Some, such as pansies, simply stop blooming when the temperatures climb. And even a few hot days in late spring can significantly shorten the bloom time for flowering shrubs and flowers such as tulips.

There are plants that thrive in the heat, however, and it's a good idea to include at least some of these in your garden scheme, so that you will have some fresh colour during the hottest days.

Among characteristics exhibited by heat-loving plants are hairy stems or leaves, which often give a grey appearance, and which are self-shading. Look also for those with thicker leaves and stems, such as succulents, which are designed to store water. Species that originate in areas where heat is a part of their typical life cycle, such as the Mediterranean and Africa, will actually enjoy our typical summer conditions.

Here are some recommended choices to beat the heat:

Perennials

Lavender
Thyme
Catmint
Lamb's ears
Santolina
Sedum - all varieties
Yarrow
Yucca

Annuals

Gazania
Gerbera
Sunflower
Dusty Miller
Strawflower
Marigold
Creeping Zinnia
Alyssum
Verbena
Portulaca

Flowering Shrubs

Potentilla
Buddleia (Butterfly Bush)
Caryopteris (Blue Spirea)

Applying mulch will help your plants survive the heat by conserving water and insulating the roots. While most "heat beaters" will also withstand drought, be sure to supply adequate moisture for at least the first season or until roots are established.

The Oakville Master Gardeners are a volunteer group which provides gardening advice to the public free of charge. Send your gardening questions to mastergardeners@cogeco.ca

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