[NAFEX] Glockenapfel, Belle de Boskoop, CO hardiness

Douglas Woodard dwoodard at becon.org
Thu Dec 18 05:52:32 EST 2008

With apologies for the late reply:

I see that two Wisconsin nurseries offer trees of Belle de Boskoop and
Cox Orange:



Two U.S. sources of apple fruit say they have trees of Glockenapfel:

Lamb Abbey Orchards of Union, Maine

Wheeler, Michigan

Possibly propagating wood could be obtained from one of them.

In 1980 and 1981 I bought Cox Orange apples from the late Mr. Vowinckel 
in Prince Edward County, Ontario, in the southeast of the county (by 
Milford if I recall rightly) on the shore of Lake Ontario in zone 6a. 
Prince Edward County is the peninsula which projects into the lake from 
its north shore near its east end. After the test winter of 1980-81 he 
told me that he had lost half of his Cox Orange trees (on MM111 I think) 
to that brutal winter, which had not only severe cold just after 
Christmas but a very warm prolonged thaw in February followed by very 
cold weather in March. However some Goldcot apricots near me on Amherst 
Island survived, though not by much. A little farther north in Prince 
Edward County and in the apple growing regions on the mainland near the 
lakeshore in zone 5b, the Northern Spy crop suffered, and the Rhode 
Island Greening crop was reduced by 90% with some trees killed.

Robert Osborne of Corn Hill Nursery in southeastern New Brunswick (zone 
4b) and Siloam Orchards just north of Toronto near Uxbridge (zone 6a/5b) 
have both described Cox Orange as tender with them.

My guess is that Cox Orange in Minnesota Zone 4 might survive a run of 
favourable winters, but might also be killed at any time. Cox Orange is 
notoriously unsuited to continental climates with hot summers.

Of Cox quality apples which might be hardier than Cox itself, Ashmead's 
Kernel is reported by Edible Forest to have been damaged at minus 42 
degrees F. Holstein and Erwin Baur (Bauer?) are reported to be seedlings 
of Duchess of Oldenburg so may be fairly hardy. Tumanga is reputed 
hardier than Cox. Laxton's Epicure (in England picks end of August and 
keeps about a month) is a cross between Cox and Wealthy with some 
Wealthy tree characters, though I know of no North American sources. 
Ribston Pippin used to be grown in zone 5 in Ontario though its season 
became earlier in the warmer Niagara Peninsula.

I have no idea how hardy Kidd's Orange Red is but it is reputed to suit 
Continental climates.

The late Fred Janson considered the prairie-hardy August apple Mantet 
(bred at Morden, Manitoba in zone 3b, a Tetofsky seedling thought to be 
possibly pollinated by McIntosh)) to be in the same quality ballpark as 
Cox. I think the article in which he expressed the view was in Fruit 
Varieties Journal between 20 and 30 years ago.

Your inquirer might be well advised to try some of the higher-quality 
Minnesota bred apples like Sweet Sixteen, Keepsake and Regent, if she 
has not already done so. The Canadian Norkent (zone 2b?) has been 
compared to Gala.

If she is disposed to learn to graft she might also consider that 
topworking on a fully hardy framework greatly improves the recovery from 
cold injury and cumulative yield. Shelter from cold drying winter winds 
is important, as are shelter from low-angle late afternnon late winter 
sun, and air drainage (planting on slopes) to avoid the coldest 
temperatures in still winter nights with clear air allowing radiation 
cooling. Painting with white interior latex paint to delay coming out of 
dormancy can be helpful. Well drained soil and management of pruning, 
fertilizing and watering to encourage coldhardiness are also helpful.

I have no personal experience with any of these fruits (barring Spy, 
Wealthy and R.I. Greening) except Cox Orange, and none with its tree.

Doug Woodard
St. Catharines, Ontario, Canada

derry&bill wrote:
> I've received an email from a home gardener in Minnesota. She grew up in 
> Switzerland and her father had a few apple trees. She wants to know:
> 1) if Glockenapfel, Belle de Boskoop and/or Cox's Orange will grow in 
> zone 4?
> 2) is there a supplier of these varieties in the Eastern US?
> 3) is there a supplier anywhere else in the US?
> Thanks for any information you can give me.
> Derry Walsh
> south coastal B.C.
> where a Arctic front has just moved down and we're experiencing -6°C 
> (21°F) and there's a forecast of -13°C (9°F) on Friday. Brrrrrrr.

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