Fertilization

The type and quantity of fertilizer should be based on soil test recommendations. Analyses such as 12-4-8, 16-4-8 or 10-10-10 are commonly recommended and available. For best results, fertilizer should be applied with at least 30 to 40 percent of its nitrogen in the ammoniacal or urea form. These forms of nitrogen are released slowly to the plant and do not leach from the soil as readily as nitrate nitrogen. Generally, 2 to 4 pounds of a complete fertilizer per 100 square feet per year is recommended for optimum growth. This quantity is applied on a broadcast basis under the canopy of trees, shrubs and climbing vines or over-the-top of ground covers.

Frequency of application depends on vigor and desired growth rate. One application may be sufficient on mature plants while two or three light applications may be required for optimum growth on young plantings. Fertilizing should begin in early March, prior to spring growth, and should be halted by the end of August. Plants must be watered after fertilizer is applied.

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