Fertilising a Physocarpus opulifolius 'Dart's Gold'
To ensure the vibrant foliage and robust flowering of this shrub, a consistent fertilization schedule is key. It is recommended to apply a balanced, slow-release fertilizer early in the spring to support the initial flush of growth and the development of flowers. A second application can be made after the blooming period in late June to encourage healthy foliage and plant vigor throughout the summer months.
When applying fertilizer, distribute it evenly around the base of the plant, extending out to the drip line, and water thoroughly to help transport the nutrients into the soil. Care should be taken to avoid over-fertilization, which can lead to excessive growth at the expense of flower production. For this species, which flourishes in a variety of soil types, a moderate approach to fertilization will yield the best aesthetic and horticultural results.