Chrysanthemum Plants Too Large - Knowledgebase Question

Ponca City, OK
Question by lrouse
October 24, 1999
Just moved to a home with lots of beautiful mums. The problem is that they are all too tall. The main stalk of each cluster is 10" to 12" tall. After blooming they lay over leaving a large void in the center. Is it too late to do anything for these plants? Should I decrease the stems from the main stalk to encourage fewer larger blooms, or just stake them up? If I dig up and divide next spring do I re-plant or discard the taller ones?


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Answer from NGA
October 24, 1999

0

It is too late to do anything this year except to stake them gently. After frost has killed off the tops you can trim them back to about four inches. Next spring, trim them back again before you divide them and remember that the outer sections of each crown will make the most vigorous plants. With regard to height, they can be pinched at regular intervals up until early July, then allowed to grow on and develop their flower buds. This will result in the bushiest possible plants, but the ultimate height is basically determined by the variety of mum you have -- they are available in a wide range of heights. Sometimes mums flop open regardless of what you do -- if this is the case, either be prepared to stake them each year, or try a different variety.

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