TOW: Growing tender bulbs in cold climates
J.E. Shields (Tue, 08 Apr 2003 06:48:22 PDT)

Hi all,

I've been doing this, or trying to do this, for 30 years. There are
hazards and pitfalls, as has already been pointed out by Roger and Mark.

We are at latitude 40° North so our winter sun is a lot weaker than the
winter sun at the latitude of Cape Town. Our Lachenalia plants get too
warm and not enough sunlight sometimes, resulting in rather etiolated
scapes. Haemanthus seem to take an eternity to grow to bloom size. On the
other hand, our Clivia plants do well with little or no shading during
December and January here. this seems to be further evidence that our
winter sunlight is relatively weak.

Cyclamen do not do terribly well outdoors here. Cyclamen coum and
hederifolium have survived in the ground in some places, at least for a few
years. C. hederifolium even blooms a bit in autumn growing in the ground;
C. coum outdoors in the ground rarely manages to put up more than an
occasional leaf, and no flowers.

In the greenhouse, it is an entirely different matter. They thrive in the
cool greenhouse alongside the etiolated Lachenalia and slow Haemanthus. In
late summer and autumn, pots of hederifloium are a great joy. CC. cilicium
and graecum bloom in late autumn, for a relatively shorter time. In
December or January, C, coum takes over from hederifolium to produce
abundant cyclamen bloom in the greenhouse.

Right now I have only CC. purpurescens and repandum repandum in
bloom. Actually, there is some question about the identity of the C.
purpurescens.

I have posted a picture of my Cyclamen purpurescens at URL =
http://shieldsgardens.com/amaryllids/… along with an image
of Cyclamen colchicum growing in the same greenhouse.

The C. purpurescens was grown from seed from Joy Bishop, and it bloomed
first in only about 18 months from sowing. It was planted in September
2000. This year is its second bloom season. The leaves, as shown in the
image, have silver mottling. The flowers are large, compared to the C.
colchicum (petals ca. 1 inch long in purpurescens vs. ca. ½ inch in
colchicum). From start of bloom, in 2002, these plants bloomed well into
December. They then went dormant for a couple of months, but now they are
blooming again.

Dormant storage of tender bulbs is another matter. The cyclamen seem to do
best when stored under the benches in the lath house during summer. They
do not seem to take drying out too completely or for prolonged periods.

Jim Shields
in central Indiana (USA)

*************************************************
Jim Shields USDA Zone 5 Shields Gardens, Ltd.
P.O. Box 92 WWW: http://www.shieldsgardens.com/
Westfield, Indiana 46074, USA Tel. +1-317-896-3925
Member of INTERNATIONAL CLIVIA CO-OP