My first grow

Its been a very up and down week for sure started with finding a calcium deficiency and then found out my ph pen was out of wack so had to replace that and to top it all off had to wait for my calmag to come through the post it was expected 2 weeks earlier but due to covid and other issues delivery has been slow and it only came yesterday 12/12/2020 so that has definitely took a toll on plant num 2 but hopefully she will be on the mend soon, num 1 and 3 are fine with no deficiencys at all they all have had a tiny bit of nute burn from my own error of forgetting if i had fed nutes or just plain water so instead of just using plain ph'd water (like i should of and needed too) i decided to feed nutes and gave them a tiny bit of burn but they dont seem to mind too much other than that everything is going well so far num 2 is a little bit stunted height wise but the side branches seem to me shooting out now, num 1 and 3 are shooting up started a bit of lst on num 1 and doing some leaf tucking on all of them which seems to be creating other top sites as far as i can tell. (But im a noob so what do i know 🤣)