, Newburyport, MA


November 7, 2012

Cut back mums now, rose bushes in spring

I received a question from Dave in Newbury-port about cutting back mums. He wanted to know if they should be cut back in the fall or the spring. At this time of the year, there are a lot of questions about cutting back plants. Let me take a few moments to answer Dave’s question and address some other commonly asked questions.

You cut back the mums in the fall. The plant should be cut back level with the soil. In the spring, as the mums put up new growth, you should pick out the top shoots of the plants every few weeks until about the end of June. Pinching back the tops will force out many new shoots. This will create a mum plant that is relatively short, but very bushy. If you keep up with feeding the mum, it will create lots of flower buds that will open in the fall.

There is always a question this time of the year about cutting back hydrangeas in the fall. The vast majority of hydrangeas set their flower buds for next year on the growth that formed this past summer. If you cut back the canes now, you will get new shots in the spring, but you won’t get any flowers next summer.

How about cutting back the lawn? The lawn needs to go into winter with very short blades of grass. If you leave the blades long, they will mat down during the winter and a fungus disease called snow mold will form. Snow mold can kill off the grass. Don’t put that mower away too early or you will be doing your lawn a disservice.

Rose bushes are usually not cut back in the fall. Cutting them back in the fall does not allow enough time for those cuts to heal. The winter wind will pull the moisture out of those cuts and you may have dead canes come the spring. It is better to wait until late March or early April to cut back the rose bushes.

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