Tree Fertilizer FAQ
What is the best way to fertilize trees?
Tree fertilization methods include fertilizer tablets and spikes placed in the root zone, granular fertilizer, deep-root feeding, and trunk injection. The right method depends on the tree, the site, and the goal. Tablets and deep-root feeding place nutrients where tree roots can use them, below the competing turf layer, which is more effective than surface application for established trees.
What are tree fertilizer tablets and how do they work?
Tree fertilizer tablets are compressed slow-release fertilizer placed in the root zone, often at planting or in holes around established trees, releasing nutrients gradually where roots can access them. The tablets feed the tree steadily over time with minimal labor. Placing them in the root zone, rather than on the surface, delivers nutrients past the turf to the tree's roots.
When should I fertilize trees?
Timing depends on the tree and goal, but tree fertilization is often done in spring or fall when trees can use the nutrients for growth and root development, avoiding feeding stressed or dormant trees. Established trees in good soil may need little fertilization. Matching the timing to the tree's growth and confirming a real need, rather than feeding routinely, makes tree fertilization effective.
Why feed trees in the root zone instead of on the surface?
Surface fertilizer largely feeds the competing turf and may not reach tree roots effectively, while root-zone methods like tablets, deep-root feeding, and injection place nutrients where tree roots take them up. Tree roots extend wide and need nutrients delivered to their zone. Root-zone feeding is more effective for established trees than surface application that the lawn intercepts first.
Do established trees in good soil need fertilizer?
Not always. Established trees in healthy soil often grow well without supplemental fertilizer, and feeding should address a demonstrated need, like deficiency symptoms or poor growth, rather than being routine. Over-fertilizing wastes product and can harm trees. Assessing whether the tree actually needs feeding, based on its condition and the soil, comes before reaching for fertilizer.
Can tree fertilizer be ordered in bulk?
Yes. Tree fertilizers, including tablets and slow-release products, are stocked in quantities for landscape and nursery operations with volume pricing by quote. Operations fertilizing trees across many sites benefit from ordering in volume, choosing the application method and products matched to their trees and the way they deliver nutrients to the root zone.
