Mark Webber's Arboricultural & Horticultural Consultancy                                      Forensic Arborists & Horticulturalist

Why and when do you need to add Soil Amendments when planting trees?

Soil amendments are often a “best practice” when planting trees when there is soil test data that indicates that these materials will
improve the long-term future of the subject tree that is being installed. Adding amendments can improve soil conditions, however, if they are applied they can create conditions that will increase the likelihood of tree mortality. Remember...Do NOT Guess and add anything without a Soil Test prior to planting a tree.

There are at least four factors to consider in selecting a soil amendment that includes how long the amendment will last in the soil, soil texture, soil salinity, and plant sensitivities to salts and salt content and pH of the amendment. This information in many cases
should be predetermined prior to using or applying soil amendments.
                                                                       





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