The Morton Arb

Selection guide

Use the pulldowns below to find information about trees or shrubs

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Use our Interactive Collections Map and our Plant Collections Map to identify where plants are located on our grounds.

Members' Exclusive Plant Catalog, orders taken February 7-April 9

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Articles tagged nitrogen

  • Fertilizing Trees and Shrubs

    | Category: Tree & Plant Care | Tags: fertilizing, care, nitrogen
    A fertilization program is used to maintain trees and shrubs in a vigorous condition and to increase their resistance to injury from diseases and insects. However, the addition of any soil nutrient is recommended only if soil or plant ...