Here are some easy ways to help an American chestnut tree

Visit every 3-4 weeks and be a diligent inspector! Small cankers and infections are easily overlooked.* If you have found blight or the tree seems unhealthy, use the downloadable mud pack method (click here) on the tree and any other nearby American Chestnut trees.  

Remove blocks to water sources. Carry extra spring water bottles and gloves with you. Soil water potential appears to be as important influence on chestnut survival.* 

Carry clippers, prune dead twigs and branches and nearby trees. Light is important to the growth of most forest trees*  Hard prune 1/3 of 1 year old trees slightly above buds. Remember! Densely planted trees catch blight easily and canopy disturbance helps the forest. 

The most severely blighted trees are often found in frost pockets. Low-temperature injury to chestnut trees encourages blight development.*  

Plan ahead and pack your backpack with some nutrients!  See below or you might consider using bird droppings of a granivore like a cockatiel to mimic the Passenger Pigeon's contribution to soil. Low soil fertility appears to favor development of chestnut blight.*  

A. Ammonium Sulfate Application: Ammonium sulfate is a widely available fertilizer that provides nitrogen in a form readily usable by trees. It is relatively inexpensive and can be easily applied around the base of the tree, following the instructions for the appropriate amount. This method ensures a direct supply of nitrogen without significant alteration to the soil pH.

B. Urea Fertilizer: Urea is another common nitrogen-rich fertilizer that is cost-effective and easy to apply. It has a high nitrogen content, which makes it very efficient. Urea should be spread evenly around the tree, avoiding direct contact with the trunk, and watered in well to help in its breakdown and absorption by the roots.

C. Calcium Nitrate Application: Calcium nitrate is suitable for trees that might benefit from additional calcium, which can improve plant cell wall strength. It can also help maintain a neutral soil pH and is readily soluble in water, making it easy for trees to absorb.

When applying any inorganic fertilizer, it's important to:

• Follow the recommended application rates on the package to avoid over-fertilization, which can be harmful to the tree and the environment.
• Apply during the growing season when trees are actively taking up nutrients.
• Water the soil after application to help dissolve the fertilizer and encourage downward movement toward the tree roots.

Always consider the specific needs of your tree and consult local gardening centers or extension services if you're unsure about the best type of fertilizer to use.  

* Griffin (2011)