When to Cut Stuff?

The last couple of nights brought some hard frosts to Wellfield, accelerating the process of leaf senescence in the herbaceous layer. Hostas showing color a few days ago, a sure sign senescence is well under way, begin to droop quickly as frost crystals rip through cell structures.

The question becomes what should I cut down and when (I wrote an article a year ago on this topic in broader terms). The temptation might be to clear cut the whole bed and be done with it, however there are a number of plants you will want to leave standing.

Late summer and fall blooming species such as mums and asters need to recover some energy after spending their entire energy budget on flowering. Leave them standing at least until the entire stem and leaf system has shriveled up. I tend to leave this material up all winter both for some winter interest, but also to protect the crown of the plant. You could also cut them back on a warm winter day when cabin fever drives you out of doors.

The other category I leave alone until spring are any self seeding plants I want to encourage to drop their load for another go around. I have a stand of Agerateum which has reseeded itself over the past four seasons because I allow it to distribute seed.

Now that you have the answer, cut, slash and burn something – the latter, at your own risk; Wellfield does not condone the slashing and burning of anything!

Josh Steffen, Horticulture and Facilities Manager


One comment

  1. Without frost until later in winter, we must sometimes cut perennials and some shrubbery back before they freeze, just because they look so unsightly. I am trying to convince my colleagues to be more proactive with the alternating canes pruning technique for the elderberries. They can hold their foliage all year here, but they really look bad. It is even more awkward in Southern California, because some perennials do not look bad at all. It is easier to cut them back if they are ugly.


Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s