Thanks to everyone for that great info..
4 to 5 feet around is a worry considering where I planted them.
I was raining earlier so the ground is nice and damp. I'll have to move one of them.
I love zucchini. I use them in lots of things so that's why I thought it'd be nice to have fresh ones in the garden. I don't like it overcooked though. I like to cut them in half and steam them quickly so they're still firm and then make a mixture of maybe chopped tomato, a little bacon and some grated cheese (endless filling ideas really) on the top and then under the grill.