black rose in my garden blackberry

Ok so far I've done absolutely bugger all , Popped seed into a peat pod in a cup of terra canna professional pro soil with perlite , went on holiday over Christmas for 5 days came home too seedlings that where about 3 inches above the peat pod , I then transferred them into 10 gallon fabric smart pots , in an 80cm X 80cm tent under a kingbo dual lense optical LED one is there 900watt but doesn't draw more than 400watts from the wall so let's call it a 400watt and there 600watt light that draws 200watts , I cannot recommend these lights enough and they really do give fantastic results for the budget price , The first week I just wet the soil with non pH water once then didn't even look until week 2 , then week two I added house and garden A & B soil feed at qaurter the strengh recommend by them for the first week of veg , and they seemed too respond well but slow devolpment as you would expect for a 2 week old seedling , on week 3 I have added alittle more feed too half the recommended amount from house and garden and I will now be staying at half strengh , my temps have been at 22c lights off and 24c lights on , I am growing on a 20/4 cycle , week 3 they have got into the full swing of veg growing at least one or two nodes / set of leaves every 24 hours , the nodes are very tight together leaving no room too try and lst the tops down so I won't be doing that this time , I have been feeding every 3 too 4 days so far and with abit of luck that will stay that way for abit , as the least I need too un zip the tent the better for me lol , I have never really worried about pH and maybe that will be my down fall , but maybe not , I have just got some pH test strips so will test my feed bucket and the run off from the pots and then decide if I need too get some pH up and down , but hopefully not as I like it as simple and as little effort as possible ,if I can just open the tent once or twice a week that's enough for me , I focus on the amount of nutes and temp and let them do there thing as much as possible , this blackberry ether did not take well too being moved into the 10 gallon pot as well as the others and has stayed a very light green almost yellow until this week and is not getting some colour back and growing new leaves every few days now I will keep updating this post as I go along with any issues or just too say how fantastic they are doing , Thanks for reading ;)