Controlling Alyssum - Knowledgebase Question

Bakersfield, CA
Question by tinkerbell9
July 24, 1999
We planted some alyssum, some from seeds. Now it is spreading out of control. Hoeing it seems to just spread it. We have also carefully pulled it out, so as not to spread it further. What is the best way to get rid of the alyssum?

Answer from NGA
July 24, 1999


Alyssum spreads by underground roots and also by seeds. Your best defense is to keep the plants cut back so they don't flower (and produce seeds) and to dig the roots and stems out of the soil. If you keep the green sprouts cut back so they can't manufacture energy, the roots will eventually die out. An additional measure is to lay 3"-4" of organic mulch material over the soil to exclude light which will keep any seeds from germinating. Alyssum makes a wonderful groundcover, as long as it behaves itself!

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