Jerusalem artichokes grow like crazy. I have had plants give up to 5 kilos. They do make some people fart, but the taste is really good. Here in...
Here are some things known to be extremely cold hardy: Siberian pea shrub rhus aromatica buffalo berry bilberry cranberry honeyberry rosa...
do some research into grafting. Cotoneaster should be compatible with pears, you might also have luck with quince, medlar, aronia, flowering...
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