Name: Calvin Brown
Position at McAdam: Sales and maintenance representative
Hobbies: Talking, helping, motivating, bowling, dancing
Favorite food: Meat
Favorite plant/flower: Purple Dome Aster
Favorite garden center product: Miracle-Gro
Calvin's message to you: "Know what you want because there are a lot of plants that are similar but different."

Full sun, full shade, part sun, part shade. How’s a gardener supposed to know and understand the best place in the garden for these plants?

This determination can be an interesting proposition! Let us begin with the definitions of the terms. Then we will digress into the nuances of gardens.

Exposure refers to sun, shade, part sun, part shade, etc. Information tags on plants from the nursery will indicate which of these exposures is recommended for that particular plant.

Full Sun or Sun: the plant grows at its optimum with full sun all or most of the day. An hour of shade in the morning or afternoon would be ok.

Part Sun/Part Shade: the plant needs shade for about 3 hours of the hottest time of the day. It also means that a plant may succeed in full sun in more northern areas that do not get extremely hot sun.

Full Shade/Shade: the plant prefers little to no direct sun. This exposure can be provided on the north side of the house or under a large dense-foliage tree.

Now that you have the definitions (as provided by the Sunset Western Garden Book), don’t be surprised to learn that there are exceptions to the rules.

The effects of full sun on a plant are quite different in cooler and warmer climates. Full sun in a very hot climate may be too much for the same plant that loves full sun in a cooler climate. That plant may need to be in part shade or even indirect sunlight in the hotter climate. Conversely, a plant that requires full shade in warmer climates may grow quite nicely in partial shade, if the climate is cool.

Physical structures can contribute to these exposure issues. Think about where in your garden this new plant is located. If you plant near a white or almost white building, along a concrete sidewalk, a plant that may normally take full sun may find that it is too hot and bright in this location. Light-colored buildings, light-colored sidewalks, and pools all reflect much light and generate more heat that might prove to be too much for some plants.

Alternatively, if your white house, light-colored walk and pool are in full shade, that same reflected light could allow you to grow otherwise sun-loving plants in the part shade or shade.

What happens if you grow a plant without following the exposure recommendation?

Flowering plants or variegated plants that love sun but are grown in the shade may not flower to their full potential. The variegation may revert to a solid green color, and the plants may become leggy and less attractive than they could be.

Plants that love shade but are grown in the sun may wilt, especially in the warmest time of the day; flower color may fade; and foliage color may bleach and dry out. The plant will live under constant stress.

There are very good reasons for the exposure recommendation on each plant tag, but many plants have built-in flexibility in a garden. Look around your neighborhood and take note of the light exposure for the plants you like. Get to know your own garden and discover whether or not you can slightly bend these rules. And above all, trial and error is the best way to learn! Happy Gardening!

Hardy range: Zone 4B to 8B
Height: 15’ to 20’
Spread: 15’ to 25’
Growth rate: Slow
Form: Rounded and vase shape
Exposure: Full shade to full sun