Citrus > Cold Hardy Citrus

The eremo- hybrids, which ones are worth it?

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Peep:
Last time I was asking about satsuma's, now the eremo's.

From what I have gathered there is:

1. Eremorange (-14°C)
2. Eremolemon Coachella (-12°C)
3. Eremomandarin (-?°C)
4. Citrangeremo (-15°C)
5. Citrus glauca x shekwasha (-?°C)

- Eremorange is the most popular, so I expect it to be good and it has good cold resistance, so I will add this to my collection

- Eremolemon is also reasonably popular, not as cold hardy, but because lemons overal aren't very cold hardy, I still think it is interesting to have (I have this one already).

- Citrangeremo, some information about it on the internet, but I did not find much about fruit quality or how it compares to Eremorange. It could be a little more cold hardy due to the poncirus genetics, but I'm wondering if it's worth it if Eremorange has better taste.

- Eremomandarin I haven't found much about it...

- Citrus glauca x shekwasha, I think this is also considered an eremomandarin. Not much information, especially about fruit quality. Adavo has it.


Any people here that have some experience with these? I could just get all of them for my collection, but I will already have so many varieties that I would rather preemptively remove some, instead of waiting until I can test and taste them all.

Here's a picture of my Eremolemon Coachella on poncirus. I have another one from Lenzi on carrizo, which I took a scion from and grafted on poncirus

Perplexed:
Eremolemon is actually a citrus glauca x grapefruit instead of a lemon.
Source: https://books.google.com/books?id=tk7DaWYvuPAC&pg=PA149&lpg=PA149&dq=Coachella+Eremolemon&source=bl&ots=398gnZmEaG&sig=dXF_dpI9jtXmUUiQklXimVeJ9F0&hl=en&sa=X&ei=s7H1UqewD4i6kQeFjoGwBw&ved=0CDkQ6AEwAg#v=onepage&q=Coachella%20Eremolemon&f=false

SoCal2warm:
Let me first say I am not expert in this specific area, but from what information I have found, I believe that Citrus glauca is only about equal in cold tolerance to Satsuma mandarin. (Even though Satsuma mandarin can be rather cold tolerant in some situations)
This makes me skeptical that Eremo- hybrids with ordinary citrus fruit species could be as cold tolerant as claimed.

I do know that Citrus glauca is very drought tolerant, so that might potentially resist desiccating cold winter winds, and perhaps it enables the root systems to sprout back.

Of course, the person who made the opening post lives in climate zone 8b, so I am sure all sorts of only marginal hardy citrus varieties could survive there. Even a Satsuma mandarin might perhaps survive for him if planted in a protected spot. If he lived in 8a, it would be very much more difficult, and zone 7 nearly impossible.

It should also be noted that there is a big difference between zone 8 in the US South versus zone 8 in Europe. (Given the same climate zone number, I think the South is easier to grow in most years, due to the longer growing season and greater warmth)

Florian:
I have a glauca x Shekwasha and a Citrangeremo. I have had them in pots for a few years. The glauca x Shekwasha has been flowering profusely but until now has never fruited. The Citrangeremo hasn't even flowered yet. So, this spring I decided to plant out the Citrangeremo and see what happens. I hope the change of environment might prompt it to flower. Winter-wise, we would probably be in zone 7b but recent winters have been mostly 8a to 9a, so I don't know when I will be able to put it to a real test. Anyway, if it dies, it dies and the glauca x shekwasha will be next.

Also, I consider those hardiness ratings (-14 C) as mere indications. They are often given by sellers or people who live somewhere those temperatures only last a short time and then rise above 0 C the next day.

Here's a pic:

Peep:
@Perplexed

Interesting, on the website from Lenzi, where I bought it from, it is said to be a cross with Meyer. EDIT: In the book from Olivier Biggio he also writes it's a cross with "citronnier" (lemon).

@SoCal2warm

I haven't looked into it yet, but I also don't really understand where the cold hardiness comes from in these hybrids. Except for maybe the citrange and shekwasha cross.

@Florian

I also just use the temperature numbers as indications to rank different varieties. For example it tells me Eremolemon is less hardy than Eremorange. It seems that many people, not just you, who have the citrangeremo and shekwasha cross have trouble getting them to be productive.

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