Hi Popi..It could be too late to try growing by seed,
Also the climate may be a bit on the cool side.
Have a look at the link below it may help....Cheers..MM.

Here is a link that might be useful: DPI Qld. Paw -Paw

A really useful thing to do with paw paw seeds is dry them out then put them into a pepper mill and use them as a seasoning. They will help to tenderise meat as well as be very useful for anyone who has allergies like hay fever or asthma.

the only thing popi,

and not sure waht the dpi page says but if it was the yellow fruit they tend to sprout more male trees than female trees, so you amy need to grow 10 or 20 seedling then wait until they flower to see if you have any female trees then cut nearly all the amle trees out, they shred well through the shgredder and make top mulch additive.

lightly rinse the seeds then dry them then plant them best way i seed per say 7" pot and transplant when they look strong enough, best done early in the seaon so they get plenty of growth going before winter comes, they don't like frost when they are under about 2 meters tall.

might be best to buy a red pawpaw they all sprout bi-sexual trees and the fruit is supposed to be just as nice, they will cross pollinate with the yellows readily so if you get fruit for the seed you need to remember that.

they sell supposedly bi-sexual yellosw at nurseries but my information when i bought one that was a male was they can only guarantee 20% chance that you will get a proper bi-sexuals or female tree.

len

Here is a link that might be useful: lens garden page