Answer: There are certain plants that escape cultivation and become problems in some areas of the country. Generally speaking, the broom that has become such a problem in the northwest is able to spread so freely because it is perfectly suited to the growing conditions there, so seeds about freely. Although I am not specifically aware of broom being a problem in New Jersey, and this cultivar is not as aggressive as the straight species, you might want to check with your local county extension just to be sure before you plant it. This would be especially important if you are gardening in close proximity to disturbed or open waste ground, natural areas, and so on where it would be able to colonize and displace native plants more easily. I hope there is no potential problem, Cytisus scoparius 'Moonlight'is a beautiful plant.
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