Aloe calendrum?

Love this one, how hardy is it?

Nice Aulladia procera. Did you see any jumping Lemurs? Watch out!

Dottydaisy2:

Most of the large tree-like Aloe species are tender. The smaller ones are usually really tough to cold.

Stan,

This area has a tremendous amount of Alluaudia procera growing. They were donated from a private garden. It's a pretty common plant because here in San Diego because of its extreme drought tolerance. It's very tender to cold, though. Luckily, the San Diego Zoo is located in zone 11b.

They do get big down south. 8' here is the biggest I've seen. I would guess somebody somewhere in the bay area has a larger one then that.
They can take 10a- easy. But,they grow slow. Mine have been moved a couple of times..a Walmart clump of 5 or 6.
2'? lol..digging them up really sets them back. I had too.

Are you talking about the Alluaudia or Aloe?

Allauaudia. I had them too close to a walkway. Now,too close to the mango..a bad combo.
I moved my big Aloe marlothii about three years ago now, for the same too close to walkway reasons.
Small lots have much of that.

I never saw Alluaudia procera growing in the SF Bay Area. I always thought it was too wet and cold for them (this is why I don't make definitive statements, because I'm always proven wrong).

The ones here are very tall over 25' tall. They were taken from an old private garden and replanted at the SD Zoo (I found this out on the zoo's horticulture tour).

The Horticulture tour is fantastic! It gives the history of many plants and trees at the SD Zoo. I found out the two large Delonix regia trees were planted in 1992. They've never bloomed, though...even though they leaf out faster than any other ones I've seen in San Diego and get plenty of heat! There's a light there that causes photoperiodism on the trees (so they don't bloom). They need to change the color spectrum of the street light.

That is spectacular!

I know. There's a lot of them at the zoo. I think it's a hybrid.

thats fabulous...

Sandra:

Thanks! They're so many Aloe species flowering in San Diego, right now.

i have a small one flowering here now....but its good to see them doing their stuff..

Is it a tree-form?

I am not sure what type it is. I will take a pic of it.

Great! I know there's so many species of Aloe.