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  • David Handley: I'm David Handley with the University of Maine Cooperative Extension.

  • And today, we're going to talk about pruning raspberries. Now, the proper time to prune

  • raspberries is really any time after they go dormant. So, this can happen at any time

  • from November right through March. Personally, I prefer to do it in the late winter/early

  • spring in March. This is because as the older canes are dying, they're sending sugars and

  • carbohydrates and nutrients back down to the root system, which will help next year's canes

  • get through the winter. Now, when we're pruning raspberries, we're

  • looking to accomplish three things. We can do them at the same time, but I'll lay them

  • out for you. The first is that we're going to narrow up the row because every year the

  • raspberries rows tend to get wider and wider. And you want to narrow that row up to about

  • two feet to about one and a half feet wide. The second thing we want to do is get rid

  • of all of the canes that fruited last year. These are called spent floricanes fruiting

  • canes that have already fruited. These canes are dead. They're just getting in the way

  • and taking up space. So, all of those are going to come out.

  • Then, the final thing we're going to do is thin the remaining canes such that there's

  • only three or four canes per linear foot. OK. So, this is going to look very thin when

  • we're all done. And we're going to be taking up the majority of the canes that you see

  • here now. As you approach the planting, you'll notice

  • there are really three kinds of canes that you're dealing with. First, are those spent

  • floricanes that we talked about. These have gray peeling bark. And they also have these

  • remains of little branches on them that we call the fruiting laterals. Any cane that's

  • showing this gray peeling bark and has these old fruiting shoots on them should come out.

  • These canes are dead anyway. When you cut into them, you'll see there's nothing but

  • brown wood in there. There's no green tissue, living tissue, at all. All of these come out.

  • The next type of cane you'll run into are a lot of weak spindly canes, very thin, very

  • short, they don't reach the trellis wires, which we'll see in a minute. These just aren't

  • going to produce very good fruit. If they're thin and short like this, all of these should

  • come out as well. Finally, and hopefully, we're going to have

  • a good selection of nice thick fruiting canes. These, if you peel the bark back a little

  • bit, you'll see they have green shoots. You'll notice that instead of the shooting laterals

  • that we saw in the spent floricanes, these just have buds. Now, in the springtime, these

  • buds are going to break and give us fruiting shoots. And that's our crop for that next

  • year. So, this is what we want to keep. And we want

  • to look for the thickest basal diameter, in other words, the thickest stems and good height,

  • OK, so that they'll reach the trellis wire and we can attach them. So, these are the

  • ones we want to save as long as they are within that two foot width perimeter that we've set

  • up for ourselves. Now, you can see here, here's a raspberry

  • row. This variety happens to be Boyne, one of my favorite varieties. And you can see

  • the row width here has gone out to three, even four feet, even though we started with

  • a row that was only a couple of feet wide. And that's because the new shoots, as they

  • came up during the summer were looking for light and less competition.

  • So, they're getting here. We don't want them. If we allow these canes to go ahead and leaf

  • out next year, they're going to be shading out all the canes in the middle. And I'll

  • have lots of fruit rot problems. And I won't want to have to reach in there through all

  • these thorny canes to harvest that fruit. So, I'll loose a lot of it.

  • So, initially, using some nice, sharp loppers, and some good thick gloves, because these

  • are thorny and I always like to wear safety glasses because these are thorns and they're

  • sticks running around your face all over the place, we can get started just cutting them

  • right at the base. And, as you're cutting, you can just pull those canes that you've

  • cut out of the way, throw them into the row, middle, so that you can collect them later.

  • We're not going to leave these behind because these can be a source of disease problems

  • for us next year. So, everything we've cut out, when we're all done, is going to be dragged

  • out of here and either chopped up and put into the compost pile, or burned, or taken

  • to the local dump, but not left here. OK. Now, that we've got this row pruned, you

  • can see how narrow the base is. We're trying to keep that row width at the base about to

  • a foot and a half to two feet wide. And then, you can see our trellis wires at about four

  • feet, are spread to about three and a half feet wide. And what we're going to do with

  • the nice canes that we left behind is attach them to this trellis wire.

  • Now, what you use to attach them is really whatever works best for you. Old bread twist

  • ties work pretty well, just take that cane, wrap the twist tie around it, and get it on

  • fairly tight so that the wind is not going to be able to blow it around too much.

  • There are some other things you can buy that have recently become popular here, some little

  • rubber bands with a little T on the end of them that can be used. And, in this case,

  • you just grab it. Bring the rubber band around. And that little T just grabs the other end

  • of the rubber band. So, that holds fairly well. It works better on thicker canes.

  • If you're a home gardener and like to grow vegetables, you're probably familiar with

  • different types of tomato clips. These are just little plastic rings that you can use

  • to clip plants on. And these will also work fairly well. We just take a cane, clip both

  • the wire and the cane and leave it there. And that's just so that the cane can't be

  • allowed to bounce back into the middle. And also, we have machines that'll do this

  • for you. These are called tapeners. And, in this case, you just grab the cane and you

  • put a little piece of plastic over it. And it works like a staple gun. You just grab

  • that, and then a staple clips it, releases it, and gives you a little piece that holds

  • on to the cane pretty well there. These are fast and relatively efficient, but you have

  • to buy a lot of tape and a lot of staples for them. And, because they're plastic, they

  • will be here for a long time. Remember, we're going to take these off next year after these

  • canes are fruited because we'll be pruning them out. And you'll have lots of little bits

  • of plastic to deal with. So, one way to get around that is to use the

  • old fashioned method which is just using some bailing twine or cotton string, whatever is

  • available to you, and just taking the cane, spreading them to the wire, and just giving

  • them a simple knot, either a slip knot or a granny knot or a square knot, anything works

  • pretty well just grab both the cane and the trellis wire. And what I like about these

  • is that you can get it fairly tight. It's fast if you fill your pocket full of little

  • bits of string cut to eight or 10 inches. And then, next year, when I'm going to prune

  • this out, I can just clip this off with a pair of scissors and it will fall to the ground.

  • It will bio degrade. I don't have to worry about plastic all over the place.

  • Now, the idea here is we're going to attach all of these to the trellis wire to spread

  • these canes out such that, here, we're going to have them spread out to three feet at the

  • base or a foot and a half. When, we're all done, we should have a nice V effect that's

  • going to allow the sun to come down and provide plenty of light and air movement through this

  • planting to make sure that we're not going to have a lot of disease problems.

  • The other thing this is going to do is put all of our fruiting canes on the outside.

  • And then, our new canes that'll fruit next year are going to be coming up in the middle

  • where we want them, and we won't have to fight our way through those thorny primocanes to

  • get to our fruiting canes. So, let's tie these up and take a good look at what the finished

  • product should look like. You can see we finished pruning. We've left

  • only the primocanes from last year. We've taken out all those dead floricanes. We've

  • removed all the scrawny growth. We've narrowed up the base of the plant so that, the row

  • planting, so we're only about two feet wide at the base and we spread them out to about

  • three feet up towards the tops of the canes. So, if you look down the row, you see we have

  • this lovely V effect. And that's just what you want to see in a raspberry planting.

  • Now, I like to leave the tops on. Some people like to ask, shouldn't I tip the raspberry

  • planting and cut the tips off? Well, the fact is that if you do that, you're cutting off

  • all these buds that are going to be fruiting laterals for you next year. If your canes

  • are so tall that you're not going to be able to reach them, when they're going to bend

  • over the wire, you can trim back a little bit. Just remember this rule of thumb, if

  • you cut off more than 25 percent of the cane tip, you're seriously reducing your yield.

  • So our planting is good to go. We're all set for the winter. And we're going to have a

  • real good crop on this for next year, and we'll be ready to set up for a good summer

  • of raspberries. [music]

David Handley: I'm David Handley with the University of Maine Cooperative Extension.

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