Green Ash

Green Ash Care

Fraxinus Pennsylvanica

What is the plant

Green ash (Fraxinus pennsylvanica) are incredibly hardy, fast-growing, and adaptable deciduous trees that can thrive in almost any habitat in their native North America.Commonly planted in urban landscapes, they're one of the most popular and prolific ash species. Unfortunately, they're now prone to devasting and fast-spreading emerald ash borer (EAB) infestation.

Because of EAB, purposefully planting new green ash trees is generally not recommended and is even banned in some regions. You should check your state's regulations, and, even if there are no restrictions on growth, think carefully before you introduce a new green ash to your area. It may end up being subject to removal and could spread the disease to trees situated nearby.

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Lighting

Full Sun

Hardiness zone

max 9b

Difficulty

Medium

Invasive

Weed

How to Care for the Plant

Water
If your garden is prone to short periods of flood or drought, your green ash tree is likely to still cope well. They do prefer to be kept consistently moist, but some standing water or dry conditions won't kill this tree off.
Pruning
Mature trees won't need much pruning. It'll really only be necessary if branches become brittle or diseased, if they have suffered weather damage, or they're growing too wide or tall for the space.Young green ash will need more pruning to help manage their form.
Fertilizer
Young trees benefit from a slow-release fertilizer with decent phosphorous levels. If you have a mature tree already established in your garden, they won't need fertilizing unless they're showing signs of stress.

Disease diagnosis

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Sunlight
Green ash prefers to be positioned in a location where they get plenty of sun.
Soil
These trees thrive in moist, fertile soil conditions. They aren't particular when it comes to pH levels, and good growth is possible in loamy, sandy or clay soil types.
Temperature
Given their wide-spread growth across the United States, it's no surprise that green ash trees can cope with a wide variance in temperatures. They're known for being impressively cold hardy.