The Tropical Fruit Forum

I was looking at making freezer marmalade and I was planning to boil it down to a viscus state at a temperature of 176F. This lower temperature greatly reduces the heat destruction of the fruit. The end product has to be frozen instead of canned because the 36F lower temperature will not adequately destroy pathogens. To get my water to boil at 176F I would have to set my canning operation at 24,000 feet above sea level or set up a vacuum pump that would pull 6.87 psi of vacuum. The boiling rate would have to be closely monitored to not over run the vacuum pump. Heat input would have to meet the motor power to pull and maintain the appropriate vacuum needed. I think that the 24,000 foot elevation is unattainable.  Has anyone here ever use a vacuum pump hooked up to an "anti-presure" cooker to control cooking temperature for making marmalade.

Steve

My first 3 Fukushu kumquats from my outside in ground seed grown kumquat tree.  The smallest fruit had no pulp and was sweet with a slight bitter after taste.  The next size up has a sweet peel with no aftertaste and a slightly sour pulp.  My wife will have to report on the large one after eating.

Just brought my Seed grown New Zealand lemonade tree inside So far it has seen 22F, 22F, 20F, 25F, and many hard frosts. to date. I am warming the roots up to hibernation temperatures for that of an in ground tree so I can put it back outside for the up coming 17F, 13F to determine cold hardiness of this cultivar 01-02-2022



It is now down in an unheated basement to prevent coming out of dormancy.  It has seen 2 months with most nights below freezing.

I have grafted a poncirus trifoliata onto Seville sour orange & then grafted Fukushu kumquat onto the PT

The New Zealand Lemonade on the buckets is supposed to be Fukushu kumquat.

planted a seed grown Meiwa kumquat outside in ground today.  Needed to plant to fit under cicada bag for the 17 year cicadas brood 10

Prepping my seed grown in ground Fukushu kumquat for the real world after the 17 year cicadas are done.

https://www.youtube.com/watch?v=5atlHwJGbhQ

Found on New Zealand lemonade tree.

I grafted 2 Flying dragon rootstock seedlings with a bud from my seed grown Fukushu kumquat tree in early September 2020.  The buds were from a leaf node count around 75 to 80.  They started  swelling first and third week in October 2020. www.youtube.com/watch?v=hDBdiqTHYOU

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www.youtube.com/watch?v=DY8vLBWPzpw