We have a hedge-row of well established jasmine growing along the fence in our back yard, and I'm just wondering where I should concentrate my watering? We have 5 of them planted at 3-4 ft intervals. Each Jasmine looks like 2 or 3 shoots came out of the ground and wound themselves together, forming one large knob that's about 4-6 inches in diameter. It's doing really well, so I guess we're getting the water where it needs to go, but I don't want to waste water.

Should direct the water at the base of each trunk, or in between each trunk?

Thanks!