Schafer is my favorite variety and it was not injured at -25 degrees. I have several of these trees, some from seeds, some top-worked on black walnut and the others grafted trees from a nursery. It grafts easily, grows rapidly and bears a fine nut.
A top-worked tree of Colby withstood -25 degrees without injury and is one of the most vigorous trees I have.
Fifteen seedlings from Crath Mayette and Crath Franquette seeds from the late G. H. Corsan, of Toronto, Canada, are developing into very fine trees, but are not yet bearing.
One of the first varieties planted, Broadview, grew rapidly and produced nuts after two mild winters, but the several trees of this variety killed to the ground after the -25 degrees of last winter.
Crath No. 1, Crath No. 39, and Breslau grew well until last winter when they were killed. Three Breslau seedlings did not winterkill.
Rumanian Giant, the first tree I grafted, killed back somewhat, but is recovering. This variety produces the largest nut I have seen and it fills well.
Top-worked trees of other varieties that were not injured last winter are Crath No. 5, Crath No. 12, SG No. 5, Crath No. 29, Graham and Crath Special.
Seedlings in the nursery row that stood severe temperature are
Carpathian D, NWF Nos. 1 and 3, FB O and FB OO, Fort Custer, Hansen,
Jacobs and others.
MR. STOKE: Does the black walnut bloom at the same time that the Persian walnut blooms?
DR. MCKAY: It bloomed near the end of the receptive period.