Different Cycles Debacle - Help Please :)

I germinated a first batch of 10 seeds and despite having the perfect conditions, only 3 germinated... I had to acquire additional seeds which took a while and so now I have one batch of three which are currently in my setup and on week three of veg while I have another 6 which are just seedlings and will be starting their first week of real veg in a few days... I should also specify I'm using a bloombox so height is a concern...

My question is this... How can I grow them all together in the same reservoir with the same nutes? I was originally going to flower the first three at the end of their third week but blending three weeks from then when batch two is ready to go in would not work well at all, the nute requirements are so drastically different...

So my idea is this... I just topped the first three... I can continue to prune those and slow vertical growth... Then keep them in veg for an additional two weeks while I blend the second batch of 6 in with them and use a nute solution that would provide both with enough nutrients to be healthy... Then I can move batch 1 out early into bloom and keep batch 2 in veg for another week... At the end of that week move the rest into bloom... The three originals will be bushier and taller but the nutrients will be the closest while leaving batch 1 in veg for the shortest period of time...

Does that sound like the best solution? I'm open to any suggestions

Bump from the third page... anyone?

That sounds like a reasonable solution. Bush the first batch out. Even some LST would help if height is a concern.

sounds like you've got a good handle on it

Thanks peoples!