How to Prune

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Ready to prune your Miscanthus Grass? This is the time of year to do it! Ornamental grasses start shedding little grass bits everywhere in January, and with every windy storm they become increasingly messy until in early March you have a bunch of grass sticks still upright and grass leaves piled up everywhere in your garden BUT on your plant!

You also want to prune now because if you wait too long, the new growth will begin to emerge from the base and when you whack the old growth, you’ll also trim the new shoots, which is no good.

I’ve written before about how to prune ornamental grasses – which ones you ought to whack and how, and which you ought to leave be. The Miscanthus grasses are pretty much all in the “whack” category, except for M. transmorrisonensis, the Evergreen Miscanthus that still looks green and fresh in winter. You needn’t prune that one!

Here’s a quick tutorial on how I prune Miscanthus Grass in winter:

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Brrr! What NOT to Prune in Winter

by Genevieve on January 17, 2010

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Right now it’s major big time pruning season here in Northern Cali. I’m cutting back hardy perennials, roses, fruit and other dormant trees and ornamental grasses.

But there are a few things I’m leaving alone for the time being. A lot of my favorite plants are frost-tender and can be killed by a stern frost this time of year. For some of these plants, the old, dead foliage and stems are providing just an extra degree or two of protection for the tender new buds and shoots coming along for next year.

Dormant Mexican Bush Sage - Salvia leucantha

Dormant Mexican Bush Sage or Salvia leucantha

New growth on Mexican Bush Sage Salvia leucantha

See the tender new shoots inside? The old stems help protect them from frost damage.

If you can hold off, don’t prune these frost-tender plants until after last frost, which here in Humboldt County is around mid-March:

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How to Prune Sedum ‘Autumn Joy’ (Video Tutorial)

November 30, 2009
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Sedum ‘Autumn Joy’ is a true garden classic, especially paired with ornamental grasses, lavenders and colorful sages.
It’s particularly great because during the summer when everything else is blooming, its greenish-white buds are getting bigger and bigger, creating a subtly beautiful show, then as everything else slows for the fall, ‘Autumn Joy’ bursts into bloom with [...]

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How to Summer-Prune a Floppy Miscanthus Grass (Video Tutorial)

September 26, 2009
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I’m a big fan of ornamental grasses because they add so much motion and life to a garden. If you use multiples, they’re an easy way of bringing a sense of continuity to a busy or scattered-feeling garden, because the effect of their foliage is so soothing.
Miscanthus is a favorite because it grows so fast, [...]

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How to Prune Hydrangeas (Video Tutorial)

September 12, 2009
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I love Bigleaf Hydrangeas (H. macrophylla), the traditional garden Hydrangea with either big mophead flowers or the subtler lacecap flowerheads. Most gardens have a Hydrangea or two tucked in, and why not? As long as they have composty soil and get watered regularly, they make a fantastic show of blooms with very little effort on [...]

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How to Deadhead Mexican Bush Sage or Salvia leucantha (Video Tutorial)

September 1, 2009
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I shot this video in December, when this Salvia was at the end of its blooming season and just starting to think about going dormant, but the advice for how to deadhead and prune it is still great for summer.
Right now, many of the Mexican Bush Sages in the gardens that I maintain are just [...]

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Stupid Thorns, Tasty Berries: How To Prune Raspberries (It’s Easy)

January 23, 2009

So every time I open up my pruning book to the raspberry page, I get deep unhappy furrows in my brow. Raspberries are a simple plant. Why do they have to make it so complicated?
There’s the summer-fruiting kind (with a short fruiting season), which fruit best on one year old wood. Ideally with these, you [...]

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Braving the Thorns Part 2: Pruning Your Dormant Rose

January 19, 2009

Rose pruning is such a satisfying task – you go from a tangled icky mass with thorns everywhere to a lovely clean set of sturdy stems – yet too many people are intimidated by their roses.
There’s no need to be shy! The worst thing you can do is not tackle them at all, since without [...]

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Ornamental Grasses: How to Prune Miscanthus, Stipa, and More

January 14, 2009
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Now’s the time for us mild-winter gardeners to prune back many of our ornamental grasses. But how do you know which to prune back all the way, which to deadhead, and which to leave be?
Well, if your grass is an evergreen and is still looking great, then leave it be unless you want to clean [...]

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The Military Flat-Top: How To Prune Your Astilbe (Video Tutorial)

January 1, 2009

Feathery Astilbe plumes in spring are one of my favorite seasonal shows, and even though I’m a big proponent of year-round interest, I’ll forgive a species that goes dormant if it does so with either:
A. Loads of fanfare and splashy color, or up-to-the-last-second blooms.
B. Such profoundly fast dieback that one day you are enjoying [...]

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