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Messages - Citradia

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Cold Hardy Citrus / Re: Accuracy of cold hardiness temperatures?
« on: January 22, 2018, 08:56:47 AM »
Walt, different individuals of a variety will perform differently over winter. Microclimate can be a factor, but I think different individuals from the same fruit grown from seed have varied cold hardiness in their genetics. I have dunstans citrumelos that all came from one fruit and out of 20 trees, some have frozen to death, some are currently 5 ft tall with green leaves planted on mountainside, and some are defoliated but still alive after the past three weeks of subfreezing temps here. My poncyrus flying dragon and regular PT almost always defoliate leaving a few leaves at top of trees even when we see zero degrees F. Remember that the poncyrus is dormant now and won't need as much water in winter, so don't over water. I leave my PT's alone outside in nature over winter just like any native deciduous tree and they don't get "cold damage."

Citrus General Discussion / Re: Lemon Tree
« on: January 15, 2018, 07:07:22 PM »
Lemons don't like to freeze at all, especially if in a pot. I'd say keep it from freezing anymore and make sure it doesn't dry out in garage or house. Leaves are brown and dead, but if trunk and branches not frozen too bad, it may leaf out again in spring. You can scratch trunk a little with fingernail to see if green and alive underneath bark. If trunk bark split open after freeze, tree is probably doomed.

Millet, the thermocubes are little power strips that I plug space heaters into for my good citrus which I cover with plastic/ little greenhouses. The barrels that busted were just placed next to citranges and Ichang lemons out in the open with no other protection really. The one Ichang lemon had three barrels surrounding it and then plastic over it's pvc frame; those Barrels froze and busted too. I'm not too worried about the poncyrus hybrids since my dunstans went through the past two winters without protection at all, not even water barrels. I'll probably loose the Ichang lemons, but I need to get over them anyway since they really don't stand a chance of getting tall enough to produce fruit here anyway.

Thanks guys. I've been doing this cold hardy citrus thing for 6 years now, and never had barrels bust like this. I think it usually gets warm enough to keep them from fully freezing, but the past few weeks were just too much prolonged cold. The idea of paper/ foam barrier around edges of barrel would allow for expansion, but I think we need the water as. Close to the tree as possible to benefit from the heat given off as water freezes. Also, lowering the freezing point of the water may work against the effort of warming the tree since we're making it harder for the water to freeze and therefore harder for water to give off the heat from freezing, no? What a science project, huh?

This past three weeks below freezing destroyed all of my water Barrels. They completely froze and busted at the seems. 15 or so cans lost means I'm not replacing them. These trees can either survive without protection or die. I'm over it.

Citrus General Discussion / Re: Georgia Freeze
« on: January 11, 2018, 09:41:28 PM »
They got above freezing every day, so they're probably fine.

Citrus General Discussion / Re: My first Kishu mandarin harvest
« on: January 09, 2018, 08:18:53 PM »
Wonderful! Congratulations! Great pics.

Citrus General Discussion / Re: Range of ACP
« on: January 06, 2018, 08:35:22 PM »
The map didn't show it in NC. I don't think it will spread to or throughout NC because very few people are growing citrus here. If it advances north of SC, I would think it would be due to them feeding on other members of rue family such as garden variety rue, which almost nobody has, or maybe the native toothache tree.

Citrus General Discussion / Re: Range of ACP
« on: January 05, 2018, 07:04:19 PM »
There have been posts on this forum discussing cold tolerance of ACP. I think the concensus was that the psillids can live/survive temps into the teens and don't fully succumb to cold until they've been below freezing for several days, which makes all citrus growing regions susceptible to ACP. It's been below freezing for almost the past two weeks here and counting, so My stuff is safe....under plastic with space heaters!!!

Citrus General Discussion / Re: Can you overmulch citrus in San Diego?
« on: December 26, 2017, 09:36:42 PM »
I grew up in southwest FL, Manatee county to be exact, and we and my grandparents and pretty much everyone had citrus somewhere in our yards, and guess what? We were lazy as heck! We did do special fertilizers, or water the yard unless in a drought, we didn't prune fruit trees ( citrus), we didn't spray fruit trees ( ever, never), and we sure as heck didn't mulch around trees. We had sandy ground and mouldy fruit under our trees and no grass under them because grass don't grow in FL unless you take care of it and sure don't grow well under trees. A lot of our fruit trees were under huge live oaks with scanty grass growth unless the creeping St Augustine shade-loving grass was planted there. We planted some citrus in the back forty once where all the scrub had been removed so full sun on white sand, and we mixed organic matter and black cow and black top soil into each planting site and made a berm around each tree to help hold water, but didn't use mulch, and they did fine. We mulched in flower beds though. Citrus was easy in Bradenton and Palmetto until this greening mess.

Citrus General Discussion / Re: Greenhouse Air & Heat Dispersion
« on: December 24, 2017, 11:20:22 PM »
Millet, you have electric heaters in greenhouse too, no?  Is less overall electricity used when using fans as described, as opposed to just using electric heaters on thermostat?  Or maybe you use oil heaters?

Cold Hardy Citrus / Re: Freeze protection for in ground citrus?
« on: December 24, 2017, 11:13:16 PM »
I cover my satsumas, kumquat, grapefruit trees and use space heaters with thermocubes under each plastic cover whenever it's supposed to get down to 32 degrees , because my trees have fruit on them all winter long, and a freeze here can last for days, and it can easily be 10 degrees colder or warmer on top of this mountain than it may be down in Asheville, NC. Like you, I've put too much time, money, love into my citrus over the years to lose them over a single weather event. Citranges and poncyrus, yeah, no worries, they can take it, but real citrus don't like freeze. I think your smart to protect your valuable trees. Good for you.

Cold Hardy Citrus / Re: Long term cold hardy citrus breeding project
« on: December 22, 2017, 06:44:05 PM »
Walt, I do know what PT looks like in winter and some brightly colored fruits may still be in branches, so I'd like to try to find the trees you spoke of. I also intend to call some of Whiteville's nurseries to see if they may already have some of their local PT for sale. I'd drive 4 hours on a weekend to get my hands on a better quality hardy citrus. I need to wait until after the holidays though.

Citrus General Discussion / Re: HLB Getting Worse in California
« on: December 20, 2017, 10:21:36 PM »
Having bugs that eat psillids doesn't help your trees; one bite from an infected psillid (assume they're all infected), and your tree(s) is doomed. Unless you're in a northern climate with greenhoused citrus, your stuff is doomed. We need genetic immunity bred into citrus to save species for home growers. I still wonder if other native members of the rue family such as the toothache tree may be vectors to carry greening into northern states; would be bad if we even lost poncyrus in New England.

Cold Hardy Citrus / Re: Long term cold hardy citrus breeding project
« on: December 20, 2017, 08:32:02 PM »
Walt, I looked up Livingston Creek in NC: it's crossing hwy 74 just west of Delco in Columbus county, on the south coast of NC just one county east of Wilmington. I've driven through there several times this year. I'd love to look for swamp lemons over there, but since that's 4.5 hours from where I live, don't know when I'll be able to go out there. My husband's father grew up in Whiteville in Columbus county, and he tells me he used to season fish they caught from local rivers with a small wild citrus that grew there, but he says he didn't call it a lemon.

Citrus General Discussion / Re: Can you overmulch citrus in San Diego?
« on: December 18, 2017, 09:51:27 PM »
I've learned somewhere that a layer of mulch can help insulate the soil in winter to help keep ground from freezing. I learned at one of the southeast citrus expos that different soil types hold and release heat during freezes at different rates/amounts. Maybe the question of to mulch or not to mulch is a multifaceted one: citrus roots are shallow, so if I'm in zone 6b and growing citrumelo, will mulch help keep the roots from freezing?  We also learned this year at expo that it's important to have soil moisture during a freeze, so if I'm growing citrus on a dry sandy slope in zone 6b, the mulch helps reduce erosion and hold moisture in soil. My citranges on a slope didn't start growing this summer until I mulched around them and watered them. Mulch or no mulch won't save my satsumas; I have to cover them in winter anyway. We know citrus leaves and branches and trunks don't like to freeze; I wonder how much and how deep the ground can freeze before roots die.

Citrus General Discussion / Re: Satsuma mandarins may be related to Yuzu
« on: December 14, 2017, 08:15:03 PM »
Socalwarm, what's your yuzu grafted on?

Cold Hardy Citrus / Re: Ichang lemon seeds in refrigerator.
« on: December 11, 2017, 07:28:19 PM »
Thanks guys!

Cold Hardy Citrus / Snow-kissed satsumas!
« on: December 11, 2017, 07:23:41 PM »

Had to cut me some Owari for my lunch this week.

Cold Hardy Citrus / Ichang lemon seeds in refrigerator.
« on: December 10, 2017, 06:08:56 PM »
Can I put some of my seeds in wet paper towels and put in ziplock bag in refrigerator and then plant seeds outside in spring?

I had some of their seedless Changsha too, but they had a few seeds in them, maybe three or four. A lot less seeds than what the regular ones have.

Citrus General Discussion / Re: Satsuma mandarins may be related to Yuzu
« on: December 07, 2017, 07:45:00 PM »
Another reference to McClendon's " Hardy Citrus for the Southeast" : "Changsha Mandarin ( citrus reticulata) is a very old Chinese cultivar. Such plant characteristics as pointed leaf tip, extreme cold hardiness and a skunky odor to the fruit peel point to the possibility that Changsha is a hybrid of some sort with citrus ichangensis."

Citrus General Discussion / Re: Satsuma mandarins may be related to Yuzu
« on: December 07, 2017, 07:35:19 PM »
Interesting. According to "Hardy Citrus for the Southeast" by McClendon, " Yuzu is an ancient, natural hybrid ( citrus ichangensis x citrus reticulata) that originated in Japan, where it was often used as a rootstock for satsuma ."

Citrus General Discussion / Re: Must Be A Reverse Sport
« on: December 07, 2017, 07:24:57 PM »
What a strange phenomenon.

Cold Hardy Citrus / Re: Citrumelos in England
« on: December 05, 2017, 07:29:33 PM »
Neat! I'm sure their Dunstan does well with lows of 10 degrees F.  Mine didn't drop leaves last winter with low of 7 degrees F. Glad to hear they produced fruit too.

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