Tree Fertilization - FAQs

Q. Do I need to do anything to prepare for your arrival?
A. We request that you water the base of the trees out to the edge of the tree’s canopy prior to our arrival. This softens the ground so we can get the probe into the soil. If we are not treating all the trees on your property, you can also create a map or mark the trees that you want us to treat so we are able to identify them more easily.

Q. How is it applied?
A. It is a liquid injected into the root zone with a probe.

Q. When can you fertilize trees?
A. We fertilize trees in the spring and the fall when the soil temperatures are between 40-60 degrees F. Typically this is from April-Early June, and September through October.

Q. What do I do after the trees are fertilized?
A. You don’t need to do anything, but you can water them deeply to help them absorb the product more readily.

Q. Is it beneficial for me to water the trees in the winter?
A. Yes, it is very beneficial to water trees once per month in the winter. They need the water for a strong recovery in the spring.

Q. What is in your tree fertilizer?
A. Mycorrhiza (literally fungus roots), our organic liquid fertilizer Rescue MDS, Lignin Sulfate, Microplex, humate, yucca extract, and Ferrus Plus which is a mix of micronutrients and chelated iron (iron that is available for uptake by the plant).

Q. Why is mycorrhiza so beneficial for trees?
A. Mycorrhiza helps plants survive stressful conditions such as low fertility, drought, temperature extremes, and root pathogens. The fungus prevents the plants from absorbing pollutants such as heavy metals and acids in soils. Mycorrhiza promotes an increase in xylem cell number, cell wall thickness, and lumen diameter. Mycorrhiza and trees have a symbiotic relationship: trees can’t survive without Mycorrhiza and Mycorrhiza can’t survive without trees.

Q. How does mycorrhiza work?
A. Mycorrhiza bonds itself to the root-hairs of tree roots and acts as a barrier against pollution and pathogens. It also adds mass to tree roots so the uptake of water and nutrients is easier for the tree.

Q. How long does mycorrhiza work/last?
A. Mycorrhiza will last as long as it is alive. Older trees require more mycorrhiza and younger trees typically have a hard time extracting mycorrhiza from the soil.

Q. How often should I fertilize my trees?
A. We recommend once per year for healthy trees and two times a season for struggling or younger trees. Maples, Oaks, Ashes, Birches, and trees with fall color need to be fertilized at least once per year. These species tend to develop chlorosis from a lack of iron and our fertilizer will prevent this condition, called chlorosis.

Q. I can’t afford to fertilize all my trees; which ones do you suggest fertilizing?
A. Young trees, struggling trees, Oaks, Ashes, Birches, Maples and especially trees that are new transplants, should be the priority.

Q. My trees are yellow; what is happening?
A. These trees lack iron and are suffering from a condition called chlorosis; they are unable to effectively photosynthesize and are slowly dying. Depending on the severity of the chlorosis, we will recommend either spring and fall deep root fertilization, or fertilization in conjunction with tree IV.