1st Grow - Blackberry Autos

So first week down and have learned so much already. Both girls were different shades of green, Halle being lime green and Nina a dark green. Neither were the vibrant green I was looking for. Started to suspect they weren't taking up nutrients from the soil as efficiently as they should and this was proved right when I checked the runoff water for the first time. It was 5.2 after I'd watered with 6.3. Should mean that the root soil PH is around 5.75, (water in + runoff) / 2 = root PH. My growing medium is 35% Terra Aquatica Light Mix, 30% peat moss, 25% perlite and 10% vermiculite. Little did I know that peat moss acidifies the soil. Made the rookie mistake of not checking this before I planted. I've ordered some garden lime to try bring the PH back up and am watering with a higher PH water between 6.5 and 7.0 in the meanwhile. Hopefully this will fix things and am happy I realised early into the grow. Have also ordered a soil PH meter to help monitor the issue and prevent it from happening in the future. Despite this, the ladies seem to be doing decently, although Nina is a little bit stunted and isn't keeping up with Halle's growth. Halle did germinate a day and a half before Nina though and is more vibrant. Will see how things go in week 2. Planning on starting nutrients when they've developed their 3rd set of leaves.