Evergreen euonymus is a shrub that is very popular in gardens. It is known for its shiny leaves and its ability to grow in almost any type of soil.
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About soil condition, evergreen euonymus prefers humus-rich, moist, but well-drained soils. The ideal soil is neutral to slightly acidic. If your soil is too alkaline, the leaves may turn yellow. Amending your soil with compost or other organic matter can help to improve drainage and aeration while also increasing its nutrient and water-holding capacity.
Just like other evergreen plants, the sun is very important to the success of evergreen euonymus. It is best to plant this shrub in an area that gets full sun, but it can also tolerate some shade. If you live in an area with hot summers, it is important to provide some protection from the afternoon sun to prevent leaf scorch.
The temperature condition that is best for Evergreen Euonymus is cool to moderate. They can withstand some cold, but too much heat will damage their leaves. If you live in an area with very hot summers, you may want to provide some shade for your plant.
Ideal humidity condition for this plant is around 50%. If the humidity drops below this, the leaves will start to turn brown and crisp. If the humidity is too high, the leaves will start to yellow and drop off.
Regarding fertilizer, usually the plant does not need much. In fact, too much fertilizer can actually harm the plant. If you must fertilize, use a very diluted solution and apply it sparingly. As for the roots, they are quite resilient and can withstand a fair amount of abuse. However, if you are planning on transplanting the plant, be sure to take extra care with the roots.
Pruning your evergreen euonymus is an important part of keeping your plant healthy and looking its best. When and how you prune will depend on the type of plant you have and your personal preferences. If you have a compact, mounded plant, you'll want to prune it in early spring to shape it and remove any winter damage. If you have a more sprawling plant, you can prune it in late spring or early summer to encourage new growth and keep it from getting too leggy. To prune your evergreen euonymus, start by removing any dead, diseased, or damaged branches. Then, cut back any branches that are rubbing against each other or crossing over each other. Finally, shape the plant by trimming back any stray branches. When pruning, always make clean, sharp cuts just above a node (the point where a leaf attaches to the stem). Avoid leaving any stubs, as these can encourage disease. With a little care and attention, your evergreen euonymus will thrive for many years to come.
Propagation is best done in spring or early summer, by taking semi-ripe cuttings 10-15cm (4-6in) long from the current year's growth. Remove any leaves from the lower half of the cutting and insert into a well-drained, moistened propagating mix. Firm gently and keep the cuttings moist but not waterlogged. Rooting should take place in 4-6 weeks.
Usually, the plant growth rate is quite fast, especially when young. Many can grow more than 3 feet per year. However, the growth rate will differ based on the species. For example, the Japanese euonymus can grow up to 5 feet per year while the American euonymus only grows about 2 feet per year.
Common problems for this kind of plant are scale, whitefly and mealybugs. These pests can be controlled with a horticultural oil or insecticidal soap. Powdery mildew can also be a problem, especially in areas with high humidity. Powdery mildew can be controlled with a fungicide.
Source:
Managing Pests in Gardens: Trees and Shrubs: Euonymus—UC IPM - ucanr.edu
Euonymus scale - Integrated Pest Management
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