The Tropical Fruit Forum

Citrus => Cold Hardy Citrus => Topic started by: Florian on January 21, 2020, 02:09:03 PM

Title: How to tell a fruit is frost damaged
Post by: Florian on January 21, 2020, 02:09:03 PM

I still have some fruit on my ichangensis x sinensis. We are expected to see -4/-5C the coming nights.
They have already seen a few -2/-3C and still look pristine.
Will they wrinkle or fall off or something like that when damaged by frost?
(https://i.postimg.cc/2by38vm4/20200119-141712.jpg) (https://postimg.cc/2by38vm4)

Title: Re: How to tell a fruit is frost damaged
Post by: Ilya11 on January 21, 2020, 05:39:35 PM

A surface of the peel become gray.

Title: Re: How to tell a fruit is frost damaged
Post by: Laaz on January 21, 2020, 07:21:32 PM

Usually an extended period of 28F or -2.2C will damage the fruit.

Title: Re: How to tell a fruit is frost damaged
Post by: maesy on January 22, 2020, 07:01:44 AM

Some of my exposed yuzu fruits had a few small brownish spots after -2 degrees.

Title: Re: How to tell a fruit is frost damaged
Post by: Jloup27 on January 22, 2020, 11:15:01 AM

Very beautiful fruit ! Its good ? I have ichangensis x sinensis (adavo) But apparently he's not the one.

Title: Re: How to tell a fruit is frost damaged
Post by: Florian on January 22, 2020, 03:43:07 PM

Thanks all for your answers.
Jloup, it is excellent, just like an orange.
Its coldhardiness remains to be tested in my climate. It has no problem with short cold spells down to -8/-10C (it has not been colder since I planted it) but it froze half to death after several days of continuous freezing temps in 16/17 where the absolute minimum temp wasn't even that low. This is the first time it has fruited after the damage.

Title: Re: How to tell a fruit is frost damaged
Post by: Florian on January 23, 2020, 07:22:31 AM

Quick update. The fruit is actually good to eat when the rind is still greenish so I picked two today.
 

For comparison a large(ish) navel orange. Are these spots frost damage?
(https://i.postimg.cc/ctQbF13d/20200123-131428.jpg) (https://postimg.cc/ctQbF13d)

(https://i.postimg.cc/68H1jm84/20200123-131440.jpg) (https://postimg.cc/68H1jm84)