Not only do many varieties have true blue flowers, a rarity in the garden world, many also love cool weather and are in full splendor during spring and fall. If you buy your plants from a nursery, you’ll quickly find that the most popular color is blue. Most prefer moist, hummus-rich, slightly acidic soil.

Lobelia is a fairly easy plant to grow from seed. It comes in many varieties and colors and makes a great addition to garden spaces, containers, and hanging baskets. Fill your containers with a good quality potting mix.

Water regularly to keep the soil evenly moist, especially during hot, dry weather. If you live somewhere with very hot and dry summers, part shade will be better.

Many gardeners love it because it’s one of only a few plant varieties to bloom with true-blue flowers.

Some perennial varieties, such as cardinal flower, prefer boggy conditions and can even be grown in standing water. Received a Royal Horticultural Society Award of Garden Merit (1993). Where helpful to the reader, some posts may contain links to products.

If you don’t want to fertilize very much over the summer, choose potting soil that has a slow-release fertilizer already mixed in. Laguna® Dark Blue — Preorder from Proven Winners beginning 12/1/20L. They can also be grown in containers set in a tray of water on a patio or deck. Varies by species. They can tolerate partial shade and may need it in hotter climates. Easy to grow and care for, lobelia is a plant for beginner and seasoned gardeners alike. Lobelia is a popular plant because it has hard to find true-blue flowers. With so many species to choose from, there’s sure to be a lobelia that will work in your garden. If you typically mulch your perennial beds to prevent frost heaving and root damage, use a light layer of mulch that won’t completely cover the basal leaves. Blooms continuously from spring until the first frost. Sign up for weekly gardening inspiration and design tips. There are several different species of lobelia, and each species now has many hybrids and cultivars. Most varieties will bloom profusely at the beginning of summer and slow down once hot weather comes. Lobelia erinus is an annual (although it is hardy in USDA zones 10 and 11), but there are other species that are perennial in USDA hardiness zones 2-8.

Perennial varieties can also be planted in the fall. To start seeds indoors, you’ll need flats or cell packs filled with a seed starting mix that has already been mixed with water until it’s damp.

Lobelia ×speciosa are popular garden hybrids (usually of L. cardinalis and L. siphilitica) with flowers in shades of blue, … var theDate=new Date() With a spreading, bushy growth habit (that can be invasive), this plant works especially well as a showy groundcover or tall border. If perennials are covered with heavy mulch over the winter, the roots can rot, especially in warmer southern climates. Annuals reach a maximum height of about 12 inches. Blend Laguna® Dark Blue, Sky Blue, and White for a greater impact. Plants are considered deer-resistant and usually aren’t bothered by many other pests either.

Several of the perennial lobelias are native wildflowers in the U.S. Perennial lobelias can be deadheaded throughout the season to encourage more flowering. Upright varieties work perfectly as a centerpiece (or ‘thriller’) in containers or along borders.