Those look like 4 gallon wastebaskets? You need to veg for at least 2 more weeks to allow the roots to fill in all that extra space. Roots don't grow much, once the flowering 12/12 cycle starts.

I used 4 gallon baskets, too...on my last grow. I only vegged an extra week after transplanted. At harvest the roots of 4 plants had not filled in the container. That is waste of soil. Two other plants in 2 gallon pots grew just as well. Go figure...

ps...wormcastings can keep the soil soggy...beware...:jointsmile:

Enjoy your grow.