Maca

I have got a precious seed packet of maca.
We are in cool climate were temperature goes down to minus 5°C (that's five degrees below freezing) at night.
Do you grow this crop in autumn or spring?
And as it's a brassica - does it cross pollinate with other members of the family? I'm not versed in seed saving but would like to safe these seeds.

Maca seems to be a pretty hardy plant. Said to repel potato pests if planted with them.

http://www.rain-tree.com/gallery/maca-cultivation.htm

Check out the maca plant data base at the bottom of the page for more info after the pictures.

One plant I haven't tried yet but want to.

I've been wanting to try growing maca since I found out about it's amazing properties and started using it.  Where were you able to find seeds, I've been unable to locate any.

I live in a sub tropical climate so not sure if it needs more cool days then we get, anyone know?

i get maca confused w/mashua for some reason...anyway here is a good thread on it:
http://forums.seedsavers.org/showthread.php?t=904&highlight=maca