I keep Aloe & Gasteria pollen in the refrigerator. It is viable up to 3 - 6 months.

I'd have thought that list of nearly 30 would have kept you busy for a while :) There is a chap on SW Cornwall, Marazion, I think his name is Mike Harvey, who grows an astonishing range of aloes outside. I think he has hybridised lots, too. Might be worth trying to track him down - I've lost touch ...

Koehres seeds 2010 Plant with spirally arranged narrow
leaves. Purchased as Gasteria brachyphylla but does not
look as a typical brachyphylla.

I try to increase their chances of survival by planting near the
garden wall, improving the drainage and covering the plants with bubble wrap for winter. It always is a lot of work but usually it pays off.
Are there any Aloe hybrids you think might be hardy which are available to buy from UK sellers?

There is a list of hardy Aloes by Brian Kemble that can be found on the internet. I wonder how the minimum temperatures listed there compare to the UK weather conditions. More than a dozen species from the list can withstand the temperature lower than -4 deg C.

What is your experience in growing Aloes outdoors. Which Aloe have you already tested and had success with. What minimum temperature it survived without leaf damage? I grow several Aloe plants in my garden in Devon which I cover with a bubble wrap from November to February to protect from rain and f...

Interesting Aloe. Nice leaf markings

My Aloe is flowering as well.

Aloe paralelifolia

I wasn’t expecting this type of growth in Aloe buhrii but it
is definitely dividing