Do you have to test ph and ppm for outdoor?

Do you have to test ppm and ph for outdoor?

You can. But you don't have to.

If their in the ground you can water them straight from your water hose and not worry

I'm just curious because a friend of mine is asking for help and I'm doing indoors and I told him to check ph and ppm for great health.

it would be a sensible precaution

and the more so if its your first grow

often growers will fertilize the soil with organic matter

a month or so before the plant out

the more info the better?