Agapanthus flower

How to grow agapanthus in a pot

Find out how to plant an agapanthus in a pot, with the help of our step-by-step guide.

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
At its best
At its best

Plant is not at its best in January

Plant is not at its best in February

Plant is not at its best in March

Plant is not at its best in April

Plant is not at its best in May

Plant is at its best in June

Plant is at its best in July

Plant is at its best in August

Plant is at its best in September

Plant is not at its best in October

Plant is not at its best in November

Plant is not at its best in December

To do
To do

Do not To do in January

Do not To do in February

Do not To do in March

Do not To do in April

Do To do in May

Do To do in June

Do not To do in July

Do not To do in August

Do not To do in September

Do not To do in October

Do not To do in November

Do not To do in December

Agapanthus make fantastic patio plants and look particularly good grown in terracotta pots. Given a sunny spot and free-draining compost, they’ll start producing spectacular flowers in June, July or August, depending on the variety, and flower for many weeks.

Discover 10 beautiful agapanthus to grow.

Although agapanthus are drought-tolerant you’ll still need to water your pots at least a couple of times a week through the summer. They’ll also benefit from a high-potash liquid feed once a week to promote good flower development.

Find out how to get agapanthus flowers every year.

The benefit of growing agapanthus in pots is that it’s easy to bring the tender, evergreen types under cover in autumn, so they’re protected from winter cold and damp. An unheated greenhouse or conservatory is ideal for over-wintering them. The more hardy deciduous types can be left outside.

Here’s how to plant agapanthus.

Agapanthus make fantastic patio plants and look particularly good grown in terracotta pots.

You will need

  • Agapanthus
  • Terracotta pot
  • Loam-based compost
  • Horticultural grit, coarse sand or gravel
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Total time:

Step 1

Fill a container with compost. Use a free-draining, loam-based compost, such as John Innes No. 2 or 3, with some coarse sand, horticultural grit or gravel mixed in. 

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Step 2

Plant a single large agapanthus, or group several smaller ones together, fairly snugly, in a pot. Position the top of the roots about 5cm below the rim of the pot.

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Step 3

Fill around the roots with compost, firming it down to get rid of air pockets. Keep the 5cm gap at the top of the pot so that water can collect and won’t run off.

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Step 4

Water well to settle the compost, topping it up with more compost if needed. Add a decorative mulch to finish off the pot and help conserve moisture.

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Step 5

Place in a sunny spot. Very young plants may need a year to become established before they flower. Feed every two weeks with a high potash feed to encourage flowering, until mid-September.

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Step 6

After flowering, cut away the old stems at their base to tidy up the display and prevent the plants wasting their energy by producing unwanted seeds.

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Restricting the roots

Young agapanthus plants like to have their roots restricted, so make sure the plant fits in snugly. After two years, repot the plants into slightly larger pots. 

Plant pot