Problem #1 - Lack of pH equipment. Successfully growing quality cannabis without knowing your pH is like finding the needle in the haystack. This is a necessary expense above all other equipment.
Problem #2 - Kellog's Patio Plus. Kellog's is actually owned by the SunGro corporation, who is very good at what they do, and cater to nurseries, if that helps establish any ethos for them. However, the Patio Plus formula is not made for cannabis, and is really an amendment for your garden soil, at best. It is important to contact Kellog and find out if there is any dirt in there mix at all. Many bagged "soils" are really soiless, as in, no dirt. Any cannabis growing in a no-dirt medium, should be grown at 5.6 - 6.3 pH range, while dirt is 6.5-7.5, or something like that, I've never grown in dirt, but might try it this season. Nothing wrong with growing in dirt, even if the hydro growers be hating.
It took subcool years and years and years to find a soil mix that doesn't need supplemental feeding, and unless you use a formula like his, or take the time needed to perfect your own mix, you will have to feed your plants. At this point I feel that they could absolutely use some of that Fox Farm about now! 25%-50% on Fox Farm, but you can honestly give Big Bloom full strength later on when you're feeling brave.
Seedlings cannot handle strong soils, or much food at all. Your Kellog's is very hot straight out of the bag, and it would explain the seed and clones struggling through the initial grow period.
My first grow was horrible, I had a much better start than you did, but in the end the flowers were so horrible they were unsmokable, and it all went into hash, which wasn't so good either. Do not beat yourself up too much over this first grow, you will put blood, sweat, and tears in, and probably get nothing out of your first run. You will learn a shit load from this though.
Based on the fact that the plants have been in the soil for so long, the age of the plants, and the fact that they've been getting only water for 2 weeks, this definitely tells me they are hungry! Bring on the fox farm, and at least get some litmus paper to check your solution pH and your run-off pH. You can adjust pH with your buffers you purchase, or you can use lemon juice (acidic) and baking soda (alkaline).