The Q&A Archives: Arizona Ash

Question: I planted an Arizona Ash and it lost most of it's leaves right away and the one's left are brown and crispy. I may have added too much B1 when I planted it. Can this burn and stunt the tree? Next time I will measure according to directions! I may have put about half a cup with 20 gallons. The other Ash didn't get any B1 and it looks great.

Answer: How disappointing about your tree! With ice cream, if one scoop is good, two is much better. But that is not true with plant supplements and fertilizers. More than the recommended amounts can easily burn plant roots, especially in summer's heat and/or soon after transplant, which "shocks" the plant anyway. At this point, don't apply any fertilizers to your trees, make sure they are well-watered, deeply through the root zone (as deep as the rootball when you planted it), around the entire canopy. A soil probe will help you determine how far water has soaked. It moves easily through wet soil but stops when it hits hard soil. If not already there, apply 3 or 4 inches of organic mulch to moderate soil temperatures and maintain moisture. Finally, your tree may have just experienced a strong case of transplant shock, and if watered appropriately, may bounce back.

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