spirea

For spirea (Spiraea thunbergii 'Ogon'), watering should be done on a regular basis but not too frequently. In the spring and summer months, water the plant once or twice a week, and in the winter, water the plant every 2 to 3 weeks. It is important to make sure that the plant does not dry out completely, so monitor the soil closely to make sure it isn’t dry. Always water the soil deeply so that the water penetrates the soil around the roots of the plant. Water as soon as the top of the soil starts to feel dry.

Spirea grows best in full sunlight for at least 6 hours a day. It can tolerate partial shade, but for best blooms and growth it should receive full morning or afternoon sun. On hot summer days, it is best to provide some light afternoon shade to protect the foliage from sunburn. Spirea should also be protected from cold winter winds, so a sheltered spot is best.

Spirea (Spiraea thunbergii 'Ogon') is best pruned in early spring, before growth resumes. Pruning should be light and maintained to keep it in shape, by selectively removing any wayward or overly long branches. Removing dead wood or any branches damaged by winter storms will also help maintain the overall aesthetic of the plant. For a more severe prune, heavy pruning can be done late in winter, or early spring, removing up to 1-third of the shrub’s wood.