The Best Time to Plant Agapanthus


Gardens with a Mediterranean climate are ideal for the growth of the lily of the Nile (Agapanthus spp.), which has trumpet-shaped blooms perched atop long stalks. This hardy perennial can thrive in saline environments and through periods of drought, but it must be planted at the appropriate time for it to develop and blossom to its full potential.

Lily of the Nile

According to the website for the Missouri Botanical Garden, the flowering season for the Lily of the Nile, which is also known as African lily and African blue lily, may begin as late as late spring or as early as early summer, depending on the temperature. The plant develops from a bulb. The majority are hardy in zones 8 through 10 according to the United States Department of Agriculture plant hardiness zones, however some deciduous hybrids are hardy in zones 6 through 11 according to the USDA. The length of the flower stalks may vary anywhere from 1 and a half to four feet, depending on the species. They all have leaves that are shaped like long straps and grow from the base. Flowers are formed in a cluster that is round in shape at the very top of the stem. When it comes to getting the most blooms out of your bulbs, you should split them every three years.

Planting in Mild-Winter Climates

The months of January and February are ideal for planting agapanthus bulbs in areas with a low risk of frost. They should be planted at a depth of 2 to 3 inches, and depending on the cultivar, they should be spaced anywhere from 1 to 3 feet apart. They may be found growing in almost any kind of soil, but they do best in soil that has a lot of organic matter in it. Before planting the bulbs, incorporate compost into the soil so that you may give them a head start. Nitrogen-rich fertiliser should be avoided at all costs. Nitrogen promotes an abundance of green growth but inhibits blooming in plants. Flowers should be given water whenever the top layer of soil starts to dry up until after they have finished flowering. After their flowers have finished blossoming, you may cut down on how frequently you water them.

Planting in Cooler Climates

The month of March is ideal for planting agapanthus bulbs in environments with a cold winter season, such as USDA zone 8, when frost is prevalent. Wait until there is no longer any risk of frost and the soil temperature has reached fifty degrees Fahrenheit before planting anything. Even though it has a modest tolerance for frost, it is still important to protect the plant’s roots throughout the winter by applying several inches of mulch around the base of the plant. Agapanthus does best in locations that get between six and eight hours of sunshine each day; however, it does benefit from afternoon shade in regions that experience high temperatures.

Planting Agapanthus in Pots

It is common practise to cultivate agapanthus bulbs in pots on sunny decks and patios. Late winter is the time of year when you should plant agapanthus that is cultivated in containers. Plant the bulbs in houseplant potting soil at a depth of around half an inch in a container that is between 12 and 18 inches wide. Place the pot in a warm, sunny location indoors, and mist the soil occasionally to keep it slightly damp. When the weather begins to warm up and there is no longer a chance of frost, you should take the container and place it in a sunny spot outside. When root-bound, agapanthus that are cultivated in pots produce the most beautiful flowers.

Insect Pests of Agapanthus

According to the information provided on the Burpee website, agapanthus is susceptible to attacks from a number of different insect pests, the most frequent of which being spider mites, thrips, mealybugs, and gnats. A forceful spray of water from the garden hose should be sufficient to dislodge the majority of the offenders off the plants. If the infestation seems to be severe, give the plant a bath with insecticidal soap or horticultural oil after the first washing. This should be enough to get rid of any lingering pests.