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Topics - hardyvermont

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Cold Hardy Citrus / Unknown Citrandarin
« on: May 06, 2019, 05:40:12 PM »
A prolific bloomer with double mostly male flowers, this was sold as US 852, but the fruit are not the same as the US 852 fruit given to me by Stan Mckenzie.  The fruit are more red than 852 and don't taste quite as good.  Seedlings seem to be identical to parent plant. 






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When trying to speed up blooming on a seedling, does the rootstock make a difference? 

3
Cold Hardy Citrus / Tetraploid Poncirus drought and cold resistance
« on: December 23, 2018, 05:04:37 PM »
"accumulating evidence demonstrate that autotetraploids exhibit
dramatically enhanced tolerance to a variety of abiotic stresses, including cold, drought, salt, heat, chromium toxicity, and boron excess"

https://onlinelibrary.wiley.com/doi/epdf/10.1111/pbi.13064

Higher amounts of sugar in tetraploid plants may add cold tolerance?

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Cold Hardy Citrus / Carport Cover
« on: December 13, 2018, 12:39:30 PM »
After a few years of success and some major dieback failure with different kinds of protection for this Owari, relatives settled on this solution last year.  A portable carport from Harbor Freight.  It has four sides, one of which is designed to be opened with zippers.  It covers 10' x 17' and is 9' high.  It goes on sale regularly.  It is big enough to handle two trees.  Fruiting this last season was the best yet, with well over 200 fruit. 

Some light, but not much gets through.  On the defunct Citrus Forum there is a posting of a citrus tree kept several weeks in total darkness without harm.  This carport demonstrates that fact also. It was covered for over two months. It showed no leaf drop or other damage when uncovered last spring.  One side is folded up on most days to keep the temperature down, but closed on cold nights.  The low last year was 10 F, -12 C.  It was kept above those temperatures but not necessarily above freezing with lights.  The frame was left in place all year.








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