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Feeding Habits-Exporer/Parkland Collection
I generally stick to monthly feedings with Plant Prod's rose fertilizer, but
some of my roses have been showing yellowing/veining/chrlorosis so I have stepped it up as follows, with first feedings of all in mid-April coincident with opening leaf buds Thérèse Bugnet - strongest grower, earliest blooms but notable chlorosis, increased feeding to bi-weekly with some but not complete improvement, will try weekly feeding for three weeks then observe results. Also observed some blackspot and mildew last year. Of all my roses this seemed to leaf out unusually late, appears weakened from insufficient feeding last year. Blanc Double de Coubert-seems to need bi-weekly to maintain healthy, waxy foliage, otherwise seems to weaken and succumb to blackspot/mildew/aphids as the summer wears on, about 1/3 winter kill but vigorous new canes developed Morden Blush-some touch of cholorisis but monthly feeding seems enough, lost lots of branches to winter kill however. One bush was about 3/4 winter killed. John Davis-no visible problems therefore monthly feeding John Cabot-same William Baffin-same Alexander Mackenzie- same but lost a few big branches to winter kill Snow cover is the best protection here in Zone 3B along with a final deep watering after the leaves drop in the fall. Some recommend a watering in winter if Chinook winds strip away all the snow, but am not sure of this last strategy. |
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