Under 6 inches to 20 feet
To 2 feet wide
Good For Privacy
Good for Containers,
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It’s amazing that the tall, dramatic spider flower is only an annual. Once temperatures warm up, it zooms to 4 feet or more plants very quickly and produces large balls of flowers with fascinating long seedpods that whirl out from it. Cut it for vases, but be aware that the flowers shatter easily after a few days. It typically self-seeds prolifically, so you only have to plant it once. Because it develops surprisingly large thorns, it’s best to keep spider flower away from walkways.Plant established seedlings in spring after all danger of frost has passed. Cleome does best in moderately rich, well-drained soil. Be careful about fertilizing or you’ll have extremely tall floppy plants. Group in clusters of 6 or more for best effect.
Moonflower is one of the most romantic plants you can grow in the garden. It’s a statuesque, ideal evening-garden plant bearing large trumpet-shape flowers that unfurl in the evening (or on overcast days) and stay open until the sun rises. Some are sweetly fragrant when open. This beautiful plant is also very heat- and drought-resistant. Beware: It’s quite poisonous, especially the seeds.Moonflower can be found as an established plant in garden centers. Plant outdoors after all danger of frost has passed. Give it moderate moisture and fertilizer. You can also train it into a treelike plant along a stake, especially in a large container. Datura reseeds freely to the point of being invasive in some conditions.
Plant a castor bean and then stand back. This is one of the fastest-growing, giant annuals in the garden, rivaled only perhaps by giant sunflower. By midsummer, you’ll have a huge (it can hit up to 20 feet) tropical plant sporting burgundy foliage. It’s a great plant to grow with kids. Be careful, though. The seeds are extremely toxic.Wait to plant it outdoors after all danger of frost has passed; castor bean hates cool weather and won’t grow well until temperatures heat up in summer.
Find more about choosing and growing annuals
How to Pick Healthy Plants
The Best Annual Flowers of 2014
Trend Spotting with BHG: Flower Combinations
Top Shade Garden Plants