Wile e Peyote
Who, what, why and where
to be honest im not to sure that looks like soil and i have only ever grown in coco with that much soil you might create uneven moisture levels in the soil thats the best thing about coco you can water in 1 spot and the coco will absorb the water and spread it around your plant pot if its just to water the plants when your not around you could try and set up individual drip rings around the three plants but in my opinion it would be very hard to dial it in in something that large hopefully someone might chime in who has a better understanding of growing in soil sorry i couldn't help moreThink i could make a drip for thisa mini big bag ...