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Canna

The Canna is a garden plant with a non wooden stem of up to 2 meters high and large leaves. In the second half of the summer flowers appear on the top.
Depending on the variety the colour of the leaves varies from green to brown and the colour of the flowers from yellow to orange and red to pink.

Treatment in the autumn

The dormant period is similar to that of the dahlia, therefore the tubers must be kept free of frost. To enjoy the flowers as long as possible in summer and autumn you can fetch the plant inside after the first night's frost when the leaves have been frosted over.
You can then cut the stem, leaving approximately 10 centimeter showing above the ground. The complete rootstock is dug out and is put away in a cold, frost free place, for example in a garage or under the floor. Please note that it is in fact too dry in the attic.
Place the tubers in an open box or crate, but not in a closed plastic bag because then they will rot. The rootstock can be divided if it is too large for the box.

Canna's after the first night's frost

Spring

In spring (In February and at the latitude of Amsterdam) you can start to divide the rootstock. It is easy to see where you can divide the several parts. You will then have several rootstocks with at least one tuber and an offshoot on each one. The number of the rootstocks can be tenfold of the number when you started the year before! The rootstocks are put in appropriate pots with potting compost or garden dirt and are placed in a cold place in the house, for example the garage or bedroom. In the heated living room the plants would grow too fast.
In the beginning the plants should be kept in the dark. When the plant begins to show bring it into the light. Two meter away from the window there is generally still enough light. Watering once a fortnight is generally sufficient, the dirt must be moist at depth.

Outside

The plants can be put outside after the middle of May when there isn't a chance of night frost anymore. Planted in a group looks the most beautiful. Place the plants 50 centimeter apart. Some weak stems can be supported. Leaves which have appeared inside could be burned when they are not protected from the sun. Beware of snails!

Roel Bosman.


Canna's after the first night's frost

Spring

In spring (In February and at the latitude of Amsterdam) you can start to divide the rootstock. It is easy to see where you can divide the several parts. You will then have several rootstocks with at least one tuber and an offshoot on each one. The number of the rootstocks can be tenfold of the number when you started the year before! The rootstocks are put in appropriate pots with potting compost or garden dirt and are placed in a cold place in the house, for example the garage or bedroom. In the heated living room the plants would grow too fast.
In the beginning the plants should be kept in the dark. When the plant begins to show bring it into the light. Two meter away from the window there is generally still enough light. Watering once a fortnight is generally sufficient, the dirt must be moist at depth.

Outside

The plants can be put outside after the middle of May when there isn't a chance of night frost anymore. Planted in a group looks the most beautiful. Place the plants 50 centimeter apart. Some weak stems can be supported. Leaves which have appeared inside could be burned when they are not protected from the sun. Beware of snails!

Roel Bosman.