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Growth of Canna Garden SeedsCanna garden seeds are produced by their flowers being pollinated either by the human hand or by a range of insects or honey eater birds. Once pollination has been done the production of the seed commences. Hand pollination is most successful early morning well before most bees and insects come out.
From pollination to a ready to harvest seed can take a while, I’ve never actually taken much notice of how many weeks it takes from pollination until the seed is ready, it would be around four to six weeks, I will update here the time taken at a later date.
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The ovary if fruiting and has swollen and is encasing some seed, note how the bottom fruit is larger than the ones above it. Canna flowers open first from the base and progress up to the top of the spike. Not all garden canna plants produce seeds, most of the large floppy Italian style cannas such as Burbank Roma and Yellow King Humbert don’t produce seed but still they fruit up and swell, from a distance they appear as if they are setting seed but they are not they are false and sterile never to produce seed. You can normally see the difference between a true seed setting fruit and a sterile cultivator, the sterile types still fruit up quite well but there are three indentation on the fruit, these indentations are around the three carpel’s which incase the ovaries, this I have noticed time and time again. ![]()
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I take the time to individually check each seed for good viability to help ensure a much better germination rate.
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