Advantages of Planting Zinnias as a Companion Plant
Among their other popular features, zinnias are known to attract wasps and butterflies. You may not think of the wasp as a desired insect in the garden, but wasps are predatory, and help keep a garden healthy by eliminating parasites and scavenger insects. Butterflies are very effective as pollinators, alighting on various blossoms around the garden as they fly around.
As a complementary plant, the zinnia encourages a thriving ecosystem, attracting helpful insects and providing an appealing plant, even during dry spells when other plants are struggling to stay alive. If you're trying to decide what combination would go well with zinnias, some of the more popular combinations are listed here.
Zinnias are great at protecting garden flowers, such as licorice plants. Because of the hardy nature of the zinnia, it can be planted alongside many common garden flowers, in just about any type of soil you wish. Like the zinnia, licorice plants prefer soil that is reasonably dry. To make the partnership complete, licorice plants are regarded as a natural repellent for mammals, including deer and rabbits. The zinnia will attract pollinating insects that are beneficial to both plants. Licorice plants also bring a rich, distinctive aroma to the garden.
Petunias and zinnias are great partners in the garden. Keep in mind that there are many different sizes of zinnia, and plant accordingly. It would be a shame to spend a lot of time and effort on designing a colorful flower garden, only to have parts of it eclipsed by a misplaced plant or two. You should take care that enough room is provided in the soil for petunias to get plenty of water, without damaging your zinnias. It may be a good idea to plant one or the other in flower pots, so that the differences in soil moisture will not cause problems for either plant.
The zinnia is a perfect complementary idea for asparagus ferns. It provides a welcome counter-point, offering bright and varied colors alongside the lush green of the asparagus fern. Even though it belongs to the lily family, asparagus fern has stalks adorned with feathery leaflets. The white flowers followed by red berries make a great backdrop for the profuse variety of colors available with zinnias.
You can plant zinnias among most other summer annuals. With the many different varieties available, you can use zinnias in several different places without ever making your flower garden appear redundant.
Take care that you don't mix them in with plants that require copious amounts of water. This could endanger all of the plants in your flower garden. The zinnia is notorious as a target for mold and fungal growths, both because the wet soil weakens the zinnia, and because most spores grow well in warm, moist environments. Zinnias like moist soil, but are not tolerant of too much moisture.