i need a bit of input for fertilizing

Joshua Rugg

how deep from the root crown should i fertilize plumeria trees? i was worrying the other day about possible root burn do to the really sensitive roots these trees have. if ou have experience with plumeria, any input will be muchly appreciated.

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lukedunbar19

In my experience fertilizing trees (maturing) can come back to bite you, giving trees fertilizer is like hand feeding your children for their growing lives, they will expect it forever. If you need to fertilze a slow release organic fertilizer is best suited.
Fertilization

"Fertilization is another important aspect of mature tree care. Trees require certain nutrients (essential elements) to function and grow. Urban landscape trees can be growing in soils that do not contain sufficient available nutrients for satisfactory growth and development. In these situations, it may be necessary to fertilize to improve plant vigor.

Fertilizing a tree can improve growth; however, if fertilizer is not applied wisely, it may not benefit the tree at all and may even adversely affect the tree. Mature trees making satisfactory growth may not require fertilization. When considering supplemental fertilizer, it is important to know which nutrients are needed and when and how they should be applied.

Soil conditions, especially pH and organic matter content, vary greatly, making the proper selection and use of fertilizer a somewhat complex process. When dealing with a mature tree that provides considerable benefit and value to your landscape, it is worth the time and investment to have the soil tested for nutrient content. Any arborist can arrange to have your soil tested at a soil testing laboratory and can give advice on application rates, timing, and the best blend of fertilizer for each of your trees and other landscape plants.

Mature trees have expansive root systems that extend from 2 to 3 times the size of the leaf canopy. A major portion of actively growing roots is located outside the tree’s drip line. It is important to understand this fact when applying fertilizer to your trees as well as your turf. Many lawn fertilizers contain weed and feed formulations that may be harmful to your trees. When you apply a broadleaf herbicide to your turf, remember that tree roots coexist with turf roots. The same herbicide that kills broadleaf weeds in your lawn is picked up by tree roots and can harm or kill your broadleaf trees if applied incorrectly. Understanding the actual size and extent of a tree’s root system before you fertilize is necessary to determine how much, what type, and where to best apply fertilizer."
Article of mature tree care from Trees Are Good - Tree Care Information

Eric Frei

Use a slow release like Osmoscote or Nitrophoska, there's many types but a broad spectrum with trace elements is often used.

Seriously though, we do not know soil type either (sand, loam, clay etc) and competing plants (lawn etc). Often when mulched trees need very little fertilizing if any at all, mulching is premium care for it.

Sandy soils would tend to leach, and clay soils are rich but poorly drained, so I'd be approaching fertilizing differently to soil type and other conditions.

In my experience those shrubs are pretty hardy and even poorly cared for bloom well. The biggest problem with them is a rust type fungal infection on the underside of the leaves, also some get leaf yellowing due to low nutrients but that is in real bastard conditions of neglect.

Stick up some pictures lets have a look.

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