| 1. | Most, however, are treated with a growth retardant to keep them small.
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| 2. | FSII, which is added to the fuel, acts as a growth retardant for them.
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| 3. | Without the greenhouse-applied growth retardants, they will be taller.
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| 4. | Neighbors using brush killers in their lawns or utility companies using growth retardants or herbicides in nearby right of ways can injure your trees.
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