Japanese spirea

Japanese spirea requires moderate, consistent watering during its growing season, especially during periods of intense heat. When watering, it is important to treat the entire root system, not just the surface of the soil. Spirea likes soil that is consistently moist but not waterlogged. Water thoroughly when the soil begins to look dry, usually about once a week during peak growing season and every other week in cooler seasons. The amount of water needed will vary depending on soil type, sunlight, climate and other factors, but 1-2 inches of water should be sufficient.

Japanese spirea (Spiraea japonica 'Norman') prefers full sun or partial shade for optimal growth and flowering. It should receive at least 6 hours of direct sunlight every day for at least 3 months during the growing season, from early spring to mid-summer. If the sun is strong or the plant is in a very hot and dry area, it is important to provide some afternoon shade, as this will help to preserve the foliage from drying out or burning.

Japanese spirea should be pruned in early spring, just before new growth begins. Remove any dead or damaged branches. Prune about 1-third of the oldest stems each year, cutting them back to the base. It is also important to thin out the centre of the plant by making cuts to the ground or to the base of the plant. The remaining thinned out variety in the center will allow more light and air circulation and will encourage dense growth on the outer edge of the shrub.