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Cold Hardy Citrus / Re: Opinions on poncirus trifoliata root sensitivy
« on: November 08, 2016, 09:16:03 PM »
Sour Orange is, or was, a great rootstock. At one time it was the major rootstock for the citrus industry. As Mark wrote it is a good stock for clay soil, and as Tom wrote it is also a good stock for salinity. What completely and totally killed the use of using sour orange as a rootstock in the citrus industry,was it susceptibility to tristeza virus. At one time I thought about using it as a rootstock in my greenhouse, but Sour Orange produces large trees, and large trees are not suitable for greenhouse culture. I do have a Saint Dominic Sour Orange tree, which I started from seed on August 14, 2006. It is growing in a Root Maker container. It is a very vertical growing tree about 8-ft. tall, with 20 - 30 fruit, pretty much the first year fruiting (last year it had 3 fruit). Perhaps I will be able to make some marmalade this year. - Millet