Can't remember, but I'm sure I killed a couple of these Paw Paw trees by trying to 'help' open the seed casings.

Notes from the time: So, I wasn't sure if they were getting on alright. The nice folks at Jungle Seeds told me to be patient, but of course I had to dive in and give a helping hand. One of the paw paw seedlings had leaves almost loose, and (we've all done it, right?) I gave the gentlest of tugs to loosen them. Well, I suspect I've ripped off those opening leaves, leaving a slightly incongruous looking bare stem. This was yesterday, and fortunately, I think I can already see new growth emerging, so its possible there is no harm done. I will be leaving the second germinated seed alone....definitely.