CITAT (RibesRubusVitis @ 02-06-2009, 13:43)
Det där med härdigheten verkar onekligen mysko. I boken anges Vanessa till minus 32 och Schuyler minus 26. (Och mycket av hemsidans text är samma som i boken.)
Med beskärning avses alltså vinterbeskärningen, som är den viktiga och är kopplad till olika växtsätt och uppbindningsformer. Vissa vinstockar får skott uppåt, andra neråt etc.
Ja, men han pratar en massa om sommarbeskärning också, t ex:
SUMMER PRUNING."The shoots on my vines grow out where I don't want
them in the summer. Can I cut them off?"
Removing green growth from a vine should be taken on a case-by-case
basis. That green, new growth is often producing food the vine needs
to help the fruit ripen and to mature the wood for winter. Further,
cutting the shoots may stimulate shoots at the end of the cut cane to
start growing, keeping the vine active late in the season when it
should be getting ready for cold weather.
...
Finally, if you prune shoots in the summer too much, you may find your
self short of good, long canes at dormant pruning time - they were
shortened prematurely.
Of course, there ARE times when the vine is just too big, either
because it's a very vigorous variety, like "Niagara", or you have no
control over the moisture or fertility of the location where it is
growing, and you have to do something to keep it from overrunning it's
space.
If you must cut green shoots, a compromise is to cut them back to the
point on the shoot where the leaves are half the size of mature size.
Until a leaf reaches that size, it isn't producing food for the vine,
so it will be missed less than mature leaves that are feeding the vine.
In general, however, it's safest not to cut or remove green shoots from
the main structure of the vine. This insures the vine will have it's
food-producing capacity unimpaired. The exception is in the removal of suckers from the trunk, which should be taken off as early as possible.
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För mig bidrar han rätt bra till att öka förvirringen