Dear Melissa,

Thank you for contacting us about your cascara tree. Cascaras are not known to be susceptible to any particular diseases, although they are sometimes prone to aphid problems.

I would not say the red margins on the leaves are normal, but they are likely due abiotic causes (weather, transplanting, etc.). If the tree is leafing out well, there is probably nothing to be done other than providing good care until it gets established.

We recommend watering new trees slowly and deeply, preferably with a soaker hose or drip system. Trees generally need about 1 inch of water or rain per week. This will moisten the soil to a depth of 2 inches since the soil is about 50% air space by volume. Keep about 2 to 3 inches of mulch over the root zone, but do not let it touch the trunk.

I hope this information is helpful. Please write again if you notice any deterioration in your tree's condition or if you have other questions.