Is an instructable for winter care, when all the leaves are fallen down, but before the start of the sprouts in the spring.
This is an instructable for organic care.
I think it is important to do those thinks also if you only have few plants.
Step 1: CUT THE OLD PLANTS
You can recognize them because they are branched, they are dead and they will not make fruit again (raspberry are an annual plant). The new one are usually only made with one unique straight trunk.
Step 2: CUT AWAY THE SICK PLANTS
This operation is really important because the sickness or parasite can spread to all the other plant or compromise the quality, quantity and the taste of the fruits.
The photos are of the main sicknesses your plant can have, but there is many other kinds, also depending from where they are and from the amount of rain and parasites of the year.
Step 3: TIE THE PLANTS
Use a gummy tier, to don't strangle the plant (I used inner tube stripes).
Thin the plants to about 10 trunks for linear meter.