You can do it in veg and run your ppm's on the low side.

BUT not in flower and all on the same recirculating system. How would you flush at the end ? We run our Ph at 5.8 early in flower and then hold it low at 5.2 towards the end for dif nute uptake. And dif additives later in flower. If you run sea of green you need to break up each stage in flower to it's own system. We did learn the hard way it makes for problems.