How do you Veg for 4 months to get past very hot summer

Hello all,

The heat here is up to 117 this summer. I have clones last the 2 months on a few CFLs and light nutrients in coco coir and solo cups.
Just now transplanted them now to 1.5 gal ventilated pots. They are small, maybe 10 x 10 inches. Want to grow to maybe 24 inches high and bushy in a 4 3/4 x 4 3/4 foot space
At this point I could veg them for just a few weeks and they could be ready for flower, however It will be up to 115 degrees outside this week and I can't efficiently run exhaust system without exhausting all my air-conditioning and still won't maintain a decent temperature in the tent. I elected to try to wait till September to flower if I can.

Question is : What is the Best way to grow them slow while LST trainig over next 2 to 2.5 months?

Thank You

Top them .but then again if I had weather like that I'd be growing outside

One thing that works for slowing growth is to remove the flag leaves near the growth tips while leaving the new growth alone, no fim, no top. If a lower catches up, do the same, eventually you'll have a branchy monster that you might want to top at some point but it helps put the breaks on the tall ones so should be helpful to you too.

Build a trellis/screen and weave it a la scrog style in parallel with flag stripping and topping. Lower the light to minimum. Cool the temps some.