Repeat flowering depends on the species and growth cycle. Healthy plants may still need a rest, so avoid forcing every plant into several displays each year.
Repeat flowering is a plant trait
Some plants produce new flowers in successive flushes. Others make one seasonal display or flower only after a particular stage of maturity. A general method that promises three or four flowering cycles for every plant is not realistic.
Find the trigger
Check whether the named plant responds to seasonal temperature, day length, new shoots or older wood. Pruning at the wrong time can remove future buds even when the rest of the plant remains healthy.
Support growth without excess
Provide suitable light, water and nutrients during active growth. More fertilizer does not guarantee more flowers and can damage roots when overused. Remove spent blooms only where that practice fits the plant and your aims.
Allow recovery and rest
Do not repeatedly stress a weak plant to provoke buds. Review the root zone and seasonal needs first. Plan a longer garden display by combining plants with different flowering seasons rather than forcing every specimen to perform continuously.
Related reading: Managing Flowering: Light, Season and Plant Health.