Nursery age

[cutejeans]

Hi everyone,
Not sure if this should go under pregnancy or another topic but I just wondered what different opinions were..
What age is too young to start nursery? My son will be 9 months when I'm due to start back at university next September and so he would need to go to nursery for a few days a week. Is this too young? X

Thanks so much for the advice everyone!

Definitely amazing advice about getting him in earlier because of bugs and to get us both used to it, feeling so much better now xx