It is a bit late so put them out a.s.a.p. I hope you have a large veg. plot. I grew them very successfully in France and fortunately they store very well because I ended up with over 30 fruits! I just looked up 'growing butternut squash' on tinternet.
If Mrs RATTER grows an avocado from seed as I did - be warned, it grows to about 30ft high, although I kept topping mine at ceiling height and it made an attractive foliage plant.