Best planted in the fall or spring from a container-grown nursery plant, burning bush grows at a moderate pace, adding about a foot of growth per year. If properly maintained, it will survive for decades. This plant contains alkaloid compounds that are mildly toxic. Plant burning bush in the spring from a potted nursery specimen at the same depth it was growing in its container. When used in shrub borders or as screening plants, give the shrubs plenty of space (5 to 6 feet), as they will quickly spread to create thickets. Even when planted as a hedge, space the plants at least 2 feet apart. The main challenge with this shrub is keeping it from spreading outside the garden. Constant attention to removing suckers is required, and truly conscientious gardeners may even want to remove the red-orange berries that allow birds to so readily spread the seeds.
Light
Plant burning bush in an area that gets full sunlight, gifting the plant with rays for at least six to eight hours a day. In warmer climates, the bush can stand a partially shady spot, especially during the hotter afternoon hours. But be aware that shadier conditions reduce the splendor of the fall foliage display.
Soil
While it can adapt to most soil types (except for soggy soil with poor drainage), burning bush prefers average soil with a moderate moisture level. It also favors a slightly acidic soil pH but will grow in alkaline or neutral soil, as well. Most important to the plant is its soil’s drainage—too much moisture can lead to root rot.
Water
Burning bush is a drought-tolerant plant once established and generally has low-to-moderate watering needs. Water as appropriate for your climate, which will be dependent on both the rainfall and humidity levels in your area. When you do water a burning bush, aim your water source at ground level instead of overhead—this method will prevent the leaves of the bush from getting drenched and keep fungal problems from occurring.
Temperature and Humidity
Burning bush grows extremely well in just about any climate conditions found in USDA zones 4 to 8. There is very little you need to do to help a burning bush thrive, but in warmer climates, you can mulch around the root mound to help keep the plant’s roots cool.
Fertilizer
Burning bush won’t need any additional nutrients once established, but young shrubs can benefit from the application of liquid fertilizer. Plan to feed a young bush three to four times throughout its growing season, from mid spring to midsummer. But a mature plant is best denied fertilizer, as it only serves to increase the speed with which it spreads.
Types of Burning Bush
The native species is a fairly large plant that can grow up to 20 feet, so many of the cultivars are bred to be smaller, more manageable shrubs. There are several cultivars of burning bush available in the trade, including:
‘Compactus’: This is a semi-dwarf variety that grows to 9 to 10 feet tall, making it a more manageable landscape plant with many uses.‘Rudy Haag’: This dwarf variety matures to be just 3 to 5 feet tall, making it the perfect compact option for a small landscape.‘Pipsqueak’: This is another compact variety (at 5 feet tall).‘Apterus’: With smooth stems rather than the distinctive ridges that appear on most varieties, this type reaches about 6 feet in height.‘Monstrosus’: This variety has very pronounced ridges on its stems and can reach 15 to 20 feet tall at maturity.
At one time, several cultivars that were reputed to be sterile were available, but these varieties have since been shown to hybridize readily into fertile varieties, leading to further problems with invasive spread.
Pruning
If you wish to keep the spread of a burning bush in check, prune off suckers coming up from the ground whenever you find them. To also halt spreading via the seeds, handpick the berries as soon as they form in fall (which means sacrificing their ornamental value) and seal them in a yard waste bag so they don’t spread. Major pruning is not necessary for this plant, but it can help keep the shrub neat and full if you give it a good trim every other year or so. This is best done in the early spring before new growth begins. Start by removing any dead or broken branches, then cut as much as one-third of all the longer stems, right down to ground level. The goal is to open up the interior of the shrub to light and air. A neglected shrub that hasn’t been pruned for many years can benefit from a hard rejuvenation pruning that cuts the entire shrub down to just a few inches above ground level. This, too, is best done in early spring. It will take some time for the plant to recover, but you will be rewarded with very vigorous growth and a spectacular shrub within a year or so.
Propagating Burning Bush
Burning bush self-seeds very readily, but if you are growing a named cultivar, these volunteers may not look like the parent plant. A dwarf cultivar, for example, may produce seeds that grow into towering 20-foot plants. So the best way to propagate an exact duplicate is by rooting softwood stem cuttings from the parent plant:
How to Grow Burning Bush From Seed
Burning bush self-seeds so readily that you are likely to lament the fact that it grows from seeds at all. Simply scattering a handful of berries in the desired location will very likely result in volunteer seedlings the next spring. The more likely goal is to prevent this plant from self-seeding, which can be accomplished by systematically removing the berries before they ripen in fall.
Potting and Repotting Burning Bush
This is a suckering plant that quickly fills up a container, so it is almost never grown in pots, except when you are propagating it from cuttings.
Overwintering
This shrub requires no winter protection. It’s best to reduce watering in late fall, as this plant doesn’t like its roots to sit in moisture over the winter months.
Common Pests & Plant Diseases
Chances are, if you have a burning bush on your property, you will at some point have to contend with spider mites, which can be a big issue for the plant. If you notice your plant browning or dying off quickly and have already ruled out other culprits (like root rot or fungal diseases), spider mites are likely to blame. Give your plant the once-over, keeping your eyes peeled for any telltale signs like fine webs at the branch joints. To eradicate your plant of spider mites, you can first try blasting the bush with strong sprays of water to remove the mites from the plant. If that doesn’t work, treat the plant with insecticidal soap or horticultural oil such as neem oil, until all signs of infestation have ceased. Another issue you may encounter with burning bush is powdery mildew, which will appear as a fluffy grey coating on the leaves of the plant. If the infection is severe, you can remove all infected branches or leaves immediately and protect new growth with a fungicide. However, powdery mildew is almost unavoidable in many climates, and many gardeners simply ignore it, as it rarely causes serious harm.
How to Get Burning Bush to Bloom
The yellow-green flowers that appear in spring are not very showy, so coaxing blooms is not a common goal. Flowers are, however, a prerequisite for the orange-red berries that appear in fall. But these berries are best avoided, as they can lead to rampant self-seeding. Birds and other wildlife will eat the berries, too, and help to spread the seeds outside your garden. If, for some reason, you want the shrub to flower and produce fruit, then make sure it has plenty of sunlight and regular moisture—that’s all that’s required.
Common Problems With Burning Bush
This shrub is largely problem-free—except for its penchant to spread much more aggressively than you want. The cost of enjoying the spectacular fall foliage is that you should be willing to spend time monitoring the shrub and removing suckers to enforce good behavior.
Careful application of a brush-killing herbicide applied to new suckers as they appear will gradually kill any remnants of the plant.
Euonymus planipes (spindle tree) an 8- to 12-foot shrub that has brilliant crimson red fall foliage. It is hardy in zones 5 to 8.Euonymus carnosus (Japanese Euonymus) is a 12- to 16-foot species with brilliant red fall foliage. It is hardy in zones 4 to 7.In addition, a native North American sumac, Rhus aromatica (fragrant sumac), offers a good alternative to burning bush.
