Undine wrote:

I've read that the following roses are hardy in Zone 4 and relatively
disease-free. Are they? They a

Brigadoon, Fragrant Cloud, Ingrid Bergman, Kardinal, Cherish, Iceberg,
Playboy, Sexy Rexy, Bonica.

Not all zone 4 locations are the same, but I can tell you that
there are no Hybrid Tea roses that are hardy in Minnesota zone 4a
without winter protection of some kind unless they are in some
fortunate microclimate.

Ingrid Bergman and Kardinal will do well here with winter
protection. Another red HT that recovers well is Olympiad.
Iceberg, Playboy, and Sexy Rexy are good Floribunda roses for the
north, but they also require winter protection.

Bonica is a shrub rose that will die back in my zone 4, but grows
well here. It also needs at least a little extra mulch over the
crown in case of a serious winter. I am not familiar with
Cherish or Brigadooon.

People in the warmer parts of zone 4 such as North Iowa and north
Illinois have reported that they can grow HT's without winter
protection by planting the bud union 4 or more inches deep.
Maybe.

Some of the Buck Roses do well here, such as: Carefree Beauty,
Praire Harvest, Earthsong, Aunt Honey and others. Some of the
roses from Canada are useful. Winnepeg Parks is trouble free
here.

All HT's need spraying or they will spot and/or mildew. However
, You may luck out and plant a variety that is resistant to the
particular strain of disease that is in your area. A particular
variety of HT may be quite healthy for one gardener and lose all
its leaves for another.

Regards,

Charles
--
Charles Perry
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