How to Grow and Care for Eastern Red Cedar

Attributes of the Eastern Red Cedar

• Pyramidal
• Salt tolerant
• Cultivars available
• Transplants well
• Good for bonsai
• Wildlife value
• Deer tolerant
• Black walnut resistant
• Air pollution resistant

Caring for an Eastern Red Cedar

Planting an eastern red cedar can be a big decision that takes a bit of thought. It can be a large tree that grows slowly, meaning it will be around for a while. Luckily while it can be a huge investment space-wise, its relative ease of care means you will not need to sink much time into the care of the tree once it becomes established in the landscape. Fortunately, being a pioneer species (i.e., a hardy species that is the first to colonize barren environments), it does not take much to establish itself in a given location. Care for the species is concerned mostly with protecting other trees in the area from pathogens that the eastern red cedar carries and ensuring that the species’ potential for weediness does not allow it to overtake areas where seedlings are not wanted.

Light

A young eastern red cedar will do well growing in full sun to part shade, but as it matures, it will do best in full sun areas. Trees grown in less than the full sun that must compete for sunlight will settle into a low-growing shrub-like habit and exhibit a form expressed by more horizontal than vertical growth. If two trees compete, consider removing the smaller of the two to allow the more dominant one to benefit from the full sun as it establishes itself.

Soil

Of least concern to an eastern red cedar’s overall vigor and health is the soil conditions it is planted in. The species does well in poor soils that others would not, which makes it able to thrive in the most intolerable conditions. When planted in good conditions, it prefers it will perform exceedingly well, establish itself quickly, and show a marked increase in growth rate. The tree’s most preferred conditions would be rich loamy, consistently moist, and well-draining soil. Extremely adaptable, the only condition the eastern red cedar cannot tolerate is standing water. Save constantly soaked roots; this species can deal with almost any soil.

Water

Initially, as it is establishing itself, your eastern red cedar will demand a good amount of water until these needs taper off and the tree develops into a tree that can hold its own against some pretty harsh drought conditions. Until it is established, though, right after planting, it is necessary to give an eastern red cedar plenty of supplemental irrigation for the first two growing seasons. Judging the water needs by the soil dampness is the best bet for the species as the tree constantly demands damp soil without allowing standing water to collect. A good way to judge is to press your finger into the soil to a depth of two inches and feel for the soil’s moisture. It is time to water your young tree if the soil is dry. Continue doing this throughout the first two growing seasons, checking a few times a week, especially in the summer, more if there are drought conditions. By the third year, you should be able to start tapering off.

Temperature and Humidity 

The range of the eastern red cedar is immense, stretching from eastern coastal Canada south to the Gulf Coast of the United States. There are vast temperature differences in this large swatch of territory, but the eastern red cedar adapts to them all. The commonality is that the temperatures in its growing range never reach extremes. To keep your eastern red cedar healthy and happy, mimic its natural habitat and grow it in moderate temperatures in areas that do not push extreme limits. Keeping it in its happy zones of USDA 2-9 will ensure it thrives.

Fertilizer

Generally, eastern red cedars do not require any supplemental fertilizer. The species thrives in poor soil as a pioneer species. Adding supplemental fertilizer is unnecessary, especially for wild-type trees. Dwarf varieties or varieties with unique forms, such as abundant fruit-bearing cultivars, may require specific fertilizing. It is best to consult any documentation of the particular cultivar for its exact needs.

Types of Eastern Red Cedar

Juniperus virginiana has many cultivars with various traits to suit your functional and aesthetic needs. With nearly 40 cultivars available ranging from dwarf to weeping to silver in color and offering excellent disease resistance, nothing should stand in your way from planting this species in your landscape.

• Juniperus virginiana ‘Burkii’: This male cultivar has a pyramidal shape ranging in height from 10 feet to 15 feet with high resistance to cedar apple rust.
• Juniperus virginiana ‘Pendula’: This female cultivar has a drooping habit and abundant fruit.
• Juniperus virginiana ‘Grey Owl’: The dwarf cultivar with an extremely slow growth rate matures around 6 feet wide and 3 feet tall.
• Juniperus virginiana ‘Emerald Sentinel’: This cultivar is superbly vigorous and hardy, thriving in extreme conditions and the harshest conditions while still looking good.

Common Pests & Plant Diseases

The eastern red cedar is luckily free from serious disease and pest issues. The only large concern that many will find to be an issue is that the species acts as an alternate host for a fungal disease, cedar apple rust. While this disease does little harm to the eastern red cedar itself, it can cause serious issues to trees in the Malus family, often causing leaf and fruit damage.

In early spring, fungal galls will emerge on the juniper tree that must be treated with a copper fungicide to prevent the spread of the disease to any susceptible trees nearby. Ultimately to be safe, all trees in the Malus family should be kept 500 to 1000 feet from any possible host.