
Plant the rhizomes in crates or bowls filled with a mixture of peat dust, sand and garden soil and they will treat you to their glorious colours earlier in the season. Asda (part of WalMart) sell washing-up bowls for about £1, and these are suitable for forcing.
- Place the Canna rhizomes into the filled crate or bowl.
- Cover them with a thin layer of moist peat dust.
- Place the crates or pots in a dimly lit room at a temperature of 15–18°C.
- Because of this high temperature the soil needs to be slightly moist. However, there is no drainage in the crate, so do not over-water, just keep it moist.
- Wait until the first leaves appear.
- Move the crates into a room in full daylight.
- Place the crates outside during the day if the weather is sunny and not frosty so that the plants can gradually acclimatize
- Bring the crates back indoors in the evening.
- When the leaves are 8–10 cm in size, move the plants to larger individual pots, at least 2 litres in size. This encourages their development and makes them stronger.
- Do not plant the young plants outside until late spring (mid-May) as they are still very sensitive to frost.
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