Set the hoop about half the height of the mature plant or slightly lower. This allows the plant to assume its natural spreading shape without going too far. Varieties with heavy flowers may need additional support to prevent them from breaking. Single stakes are best for mature plants. They are also useful for supporting lilies, delphiniums, and other vertical plants with few side branches.
Stakes made of plastic or plastic-coated steel are available in various heights and colors.
They often look like simulated bamboo with raised horizontal rings or with small projections along the stake. These projections prevent the twine from slipping. Stake single stems when the plant has almost attained its full height but before the flower buds open. At this time, stems have taken on their natural angle which should remain even after staking. If plants are in a windy location, stake earlier in the growing season.