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.
Pinch off the tops of any of the half-hardy plants that are growing too rapidly.
The half-hardy series are best sown in pots or pans under glass in mild heat, in order to accelerate germination.
half-hardy plants are those which withstand some frost or uncongenial conditions, but will not endure the severity of the climate.
They are easily raised from seeds every year, and should be treated like half-hardy annuals.
They are half-hardy woody plants, blooming in late winter and spring.
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.