Growing Canna seeds

The majestic Canna Lily (also known as Indian Shot) adds both beauty and a hint of the tropics to any garden. Canna belongs to the banana, ginger and Strelitzia (Bird of paradise) family and grows upright with sometimes colourful Banana Palm-like leaves and flower spikes of pink, red, white or yellow.

Ready-grown potted plants and tubers can be expensive if you are planning on a good display. Unfortunately, Canna is susceptible to ‘Canna Rust’, a disease that affects the leaves, has no effective cure and will eventually cause the death of a plant. The sure-fire way of avoiding the disappointment of losing your prized Cannas is to ‘backup’ your supply and grow from seed. Fortunately, the seed will not carry the virus and growing Cannas in this way is very rewarding.

Cannas are very easy to grow from seed, establish themselves amazingly quickly and may flower in the first year if sown in Autumn or mid-Winter. They will also produce plenty of seeds of their own for next year’s display!

Preparing and planting your Canna seed

You may have noticed that the seed of the Canna Lily is incredibly hard and round. In the past, these dark brown/black seeds have been used in the making of jewelry and are reminiscent of the shot pellets, hence the name ‘Indian shot’.

Because the seeds are so tough, it’s a good idea to file down their outer shells, until the surface becomes slightly lighter as you reach the inner seed. The seeds will then need soaking for about 24 hours in lukewarm before planting within a pot on the surface of moist seed compost. Push each seed into the compost a little and place within a tied plastic bag to conserve moisture

You will then need to place your pot in a dark place at around 20-25C. As soon as germination takes place (usually about 10-20 days), remove your pot from the bag and remove to a bright, frost-free position and maintain a temperature of 20-25C.

Transplant seedlings when large enough to handle into 7.5cm (3in) pots. Harden off and plant out when all risk of frost has passed and space 30cm (12in) apart in full sun.

Growing Summary

  • Sow seeds during October or February
  • File Canna seed’s hard shell
  • Soak for 24 hours in lukewarm water
  • Sow seeds in pot or tray – just pushing them into compost a little
  • Place in plastic bag
  • Exclude all light – temp. 20-25C and check daily
  • Move to bright position once seedlings appear
  • Plant Cannas out when risk of frost has passed

James Middleton

An obsessive gardener since 1982. Day-time job - web designer and developer and University lecturer.

This Post Has 4 Comments

  1. Claudia Phillips

    Great information! I never considered growing canna from seeds, but now I’ll try it.

  2. James Middleton

    Great information! I never considered growing canna from seeds, but now I’ll try it.

  3. vong hoa tang

    This is one of my favorite flowers. I like the beautiful colors of each flower, bring me the feeling of happiness of life. Thank you for your article.

  4. James Middleton

    I do like the flowers, but I must say, the foliage really makes me happy 😉

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