when should I start flowering? (check pics)

I've had these plants (See Pictures) for about 8 weeks. They are 1ft high, under 250w hps with a 270 enhanced spectrum agro bulb. It's a K2 strain from the netherlands. I have a growing area 3' x 3' and 6' high.

When should I flower? When should I clone? (See Pictures)

Thanks

K2 is a indica strain so id get them to over 3ft before i d try and bud them as indicas stop growing during flowering. nice choice K2

you want to clone when its at least a month old and before you pu it in flowing

well u can flower them now if you want,they should double or more in size,,i only vegged mine for 4weeks,,there all indica strains and i'll get about 1.5-2 onces dry weight from each,,there only 2feet tall.

Im starting the 12 12 tonight.......