I’ve tried my hand at growing canna lily from seed this year, and while they’ve flowered nicely, they didn’t get as big as I’d like. Canna can be overwintered and that’s my plan to get larger plants next year. Traditionally the plants were left in the soil and mulched well, but my soil will be too wet for this and the plants may rot. I’ve decided to dig the young plants up and move them into pots, leaving them in the greenhouse for winter. I’ve made sure to check the plants and pots for slugs as I don’t want to introduce them into the greenhouse, plus I’ve covered the surface of each pot with Slug Gone, a natural slug repellent which should protect the plants. I’m hoping that being moved to the greenhouse will give the canna a month more of growth, so they produce bigger rhizomes once the foliage dies back. This should mean more flowers next year.
Adding Slug Gone pellets