Darts gold ninebark is a beautiful and easy to grow deciduous shrub that is perfect for foundation plantings or as an accent in the landscape. It features pretty, yellowish-green leaves that turn a stunning burgundy-red in the fall. Clusters of white flowers bloom in the spring, and the berries that follow attract birds and other wildlife to the garden.
Related plant:
Physocarpus Opulifolius Darts Gold
About soil condition, ninebark is not too particular and can adapt to most soil types as long as it is well-drained. It does best in moist, loamy soil, but can tolerate some dryness. It also prefers full sun, but can tolerate partial shade.
So, like the other ninebarks, darts gold ninebark (Physocarpus opulifolius 'Dartsgold') is a deciduous shrub that's easy to grow and maintain. It's a vigorous plant that can reach up to 10 feet tall and wide, so it's perfect for creating privacy screens and hedges. One of the best things about darts gold ninebark is its beautiful golden foliage, which is illuminated even more when planted in full sun.
The temperature condition for the darts gold ninebark is that it should be kept in an area with full sun and a temperature of at least 60 degrees Fahrenheit. If the temperature drops below 60 degrees Fahrenheit, the plant may not bloom.
Ideal humidity condition for this plant is 60%-70%. Too much or too little moisture in the air can cause the leaves to turn yellow and fall off. The plant will also start to produce fewer flowers if the humidity drops below 60%.
About fertilizer, this plant doesn't seem to be too demanding and I have had success with a variety of products. I have used both organic and inorganic fertilizers with good results. As far as the root system goes, this plant is very deep rooted so make sure you have a good sized hole for it. I have also found that it is very drought tolerant once it is established.
Pruning ninebark is best done in late winter to early spring, before new growth begins. Cut back one-third to one-half of the previous year's growth. Ninebark can also be pruned hard in late spring to early summer, after it has finished blooming.
Propagation is best carried out by softwood or semi-ripe cuttings taken in summer. These can be rooted under mist with bottom heat, or in a propagator. Cuttings should be taken from young, non-flowering shoots, and be around 10-15cm (4-6in) long. Use a sharp knife to make a clean cut just below a leaf node, removing any leaves from the lower half of the cutting. Dip the base of the cutting into hormone rooting powder, then insert it into moistened potting compost or perlite. Firm gently and water well. Place in a propagator or cover with a clear plastic bag to maintain humidity.
Usually, the plant growth rate is slow to medium. However, under the proper conditions, some plants may grow rapidly. The best growth occurs in full sun and moist, well-drained soils. Plants grown in partial shade or in dry soils will have a slower growth rate.
Common problems for this kind of plant are powdery mildew and leaf spot. Problems with powdery mildew can be treated with fungicide, while leaf spot can be controlled by removing affected leaves and destroying them.
Source:
Physocarpus opulifolius - Ninebark - ucanr.edu
Common Ninebark (Physocarpus opulifolius)-Hort Answers
Effects of New Cultivars of Ninebark on Feeding and ... - academia.edu
