Some of the varieties are half-hardy and are used for summer bedding.
Like annuals, they are divided into classes of Hardy, half-hardy, and Tender plants.
It has been grown by some as a hardy or half-hardy bulb, but its true place in most gardens is in a greenhouse in pots.
half-hardy plants are those which withstand some frost or uncongenial conditions, but will not endure the severity of the climate.
The half-hardy series are best sown in pots or pans under glass in mild heat, in order to accelerate germination.
They are half-hardy woody plants, blooming in late winter and spring.
They are easily raised from seeds every year, and should be treated like half-hardy annuals.
Pinch off the tops of any of the half-hardy plants that are growing too rapidly.
The half-hardy trailing variety, C. fragilis, is specially adapted for suspended baskets or large vases.
half-hardy annuals suitable for cutting during summer, and for winter bouquets.