Primocane-fruiting raspberries and blackberries
The first growing season, primocane-fruiting raspberry and blackberry plants may produce a few fruit in the fall.
Primocane The first year's shoot or cane of a biennial woody stem.
Procumbens An epithet meaning trailing low along the ground.
Progeny testing the evaluation of seedlings of a particular cross or source.
primocane First-year growth, usually vegetative, on caneberries. Only fall-bearing raspberries produce fruit on primocanes late in summer.
Primocanes are the first year canes. They are green and frequently more hairy than thorny in appearance.
For biennials, don't cut these. For everbearers, at the end of the fall, snip off the top 3 or 4 inches.
Primocane raspberries can make an absolutely wonderful addition to your garden. Plant Primocane raspberries with help from a longtime gardener and blogger in this free video clip.
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Primocanes One-year old (or less) stems in blackberries and raspberries that do not bear fruit.
Everbearing (primocane) Raspberries aren't really everbearing, but they do generally have 2 harvests per season; one in mid-late summer and one in the fall.
The first year canes are called primocanes. On everbearing varieties, primocanes also produce fruit. After floricanes have fruited they die and the current year's primocanes continue to develop to produce next year's crop.
Blackberries produce two types of canes or stems: primocanes and floricanes. Some produce fruit on both types of canes, while other types produce fruit only on the floricane.
Primocane-bearing types, also known as everbearing raspberries, are an exception to the bramble life cycle. Primocane-bearing types have the ability to fruit in the early fall of their first year on their primocanes.
Young larvae are restricted to the cambium, circling the cane 3-4 times in a close spiral, girdling the primocane, and producing gall-like swellings.
Unlike other blackberries, 'Prime-Jim' and 'Prime-Jan' fruit on the first-year canes (primocanes) in early fall and then again on the same canes (floricanes) the next summer. This allows for two blackberry crops a year.
Individual canes are biennial: In the first year a shoot, or sucker (called a primocane), grows to its full height. The second year that same shoot (now referred to as a floricane) produces lateral branches, flowers and fruit before dying.
Next year, this year's floricanes will be replaced by new shoots, primocanes. After they've fruited, the canes die back and should be cut down to make room for the new primocanes.
Open canopies can be created by heavy pruning to maintain a narrow row of plantings, removing the first flush of primocanes, minimizing nitrogen fertilizer applic ation, and controlling weeds. Training systems also help.
can you explain to me how to tell the primocanes on the plant when there are no berries. I just planted blackberries this year and have nice healthy looking plants but no berries. Am not sure how to protect them in winter.
One that everyone thinks of is improper pruning - removing canes annually on summer-bearing (floricane) types that only produce on 2-year old canes. Note that fall-bearing (primocane) types should be annually pruned after harvest in the fall.
See also: Plant, Berry, Pruning, Growing, May