Angelonia are called summer snapdragons because the flowers look like mini snapdragon flowers, but can take summer heat. The plant grows beautiful spikes of flowers that are fragrant, attractive to pollinators, and make great cut flowers. Angelonia are available in a couple different sizes. The taller ones make nice back-of-the-border flowers. The smaller ones look great along the front border. The spikes of flowers look great as the “thriller” component of patio combinations.
Angelonia are technically perennials if you live in USDA 9 or above. They are very popular annuals everywhere else. They take the heat so they do great in the in the humid South, the dry West, and everywhere in between.
Plant Angelonia in Full Sun. They will tolerate a little shade, but they are sun lovers.
Angelonia prefer rich soil. If your soil seems a bit dusty and dry, work in some compost and other organic matter to make Angelonia the happiest. Angelonia like their water, but don’t like wet feet so in an ideal world you would have soil that holds water like a sponge, but doesn’t puddle and drown the plants. Ideal pH for these plants is between pH 5.6 and 6.5.
If you have rich soil with lots of organic matter, you don’t need very much fertilizer. One application two weeks post-transplant is probably all you will need (and then again every year after the last frost if they are perennials in your area). If your soil isn’t so great you can fertilize them up to once a month, but too much fertilizer will cause them to stop flowering. Fertilize them every other month or so if they are in containers. Use something similar to an NPK 10-5-10, or a fertilizer indicated for use in flower gardens. Always follow the manufacturer instructions for fertilizer. More is not better.
Angelonia do like a good drink, so when the surface of the soil starts to look dry give them water, but don’t water so much that it puddles. Once the root system is a little more established they don’t need quite as much water and can be watered only once the top inch or so of soil dries out.
Pests and Diseases
Angelonia don’t get a lot of pests. They can sometimes get aphids. Blasts of water help get rid of aphids. Mild soap sprays are also a good non-toxic option for aphids. If you want something strong there are many pesticides for aphids available at most garden centers. However watch out for all the pollinators on the plant!
Angelonia can also sometimes get powdery mildew. Try not to get water on the foliage to avoid fungal diseases in the first place.
Deadheading isn’t required for Angelonia, they will keep blooming no matter what. However if you want to clean them up midway through the season they will tolerate it just fine.
Angelonia are versatile garden plants. They can look good in mass plantings, in whimsical cottage gardens, along borders and walkways, in formal gardens, in patio containers, window boxes and hanging baskets. One of my favorite garden plantings is Angelonia and Vinca. This combo is one of the easiest best looking landscape designs you’ll come across for hot weather flowers. So plant a bunch of these, and then rest in the shade.