ND-- figured I'd throw in my two cents.
First off--purple urkle is a notoriously slow growing strain, I wouldn't expect it to keep up with anything, and certainly not catch back up with something else you're running. I'm running reserva privadas purple wreck, its purple urkel x train wreck and mine is an indica pheno (from the urkel I guess) and its not too fast of a grower. Its supposed to be a great purp, just slow growing but I'm sure there are shitty phenos and if yours is budding im sure you can tell whether its a keeper or not.
Before I go into the next part, just wanted to make sure you understood the difference between organic and synthetic nutrient uptake. Quick lesson--synthetic nutrients are basically just salts. They are water soluble, and in forms that the plant can readily absorb through its nutrient channels. For example, plants can only absorb nitrogen through nitrates and ammonias- so if you fed it calcium nitrate, the nitrogen would be able to be immediately absorbed. With organics, the nutrients are not always immediately ready for uptake. Beneficial bacteria must first break the organics down into simple components that the plant can absorb. This is why synthetic nutrients are so fast acting, and organic nutrients have a more delayed affect.
As far as the teas-- it is possible (and fine) to mix organic and synthetic, but you have to be realllly careful to make sure they are compatible. For example, silica (like Dyna gros protekt and botanicare's silica blast) supplements are organic (I think the protekt says "beyond organic" on the bottle lol) and help the plant withstand extremes, like heat, drought, cold--whatever. Its fine adding that to whatever medium you are growing in.
But when you start getting into actual nutrients (not just supplements) and you want to go organic in hydro/aero, then there is something realllly important that you need to understand: organic nutrients need good bacteria/microbes in order to break them down. The owner of my local grow shop is doing a huge 3,000 square foot grow for the local farmers market (veggies and stuff) and the person who he is doing it with has a wife that wants to have "organic" hydroponic plants. The owner of my store was saying that in order to do that, they would basically need to have some type of medium in the system that would continuously hold the microbes necessary to break down the organic nutrients (that aren't water soluble). I dunno if he was talking about using sponges throughout the system or what.
But in hydro, every time you do a res change you are having to start all over again with your good microbes--and adding things like peroxide, or fresh tap water that hasn't sat for 24 hours (to let the chloride evaporate) will kill any and all bacteria's, even your good ones.
If you were wanting to use a tea, it would totally be possible (be easy tho-watch your ppms and don't burn it up). But again, without good microbes in your system to break down the organic nuteients, you would basically just be wasting the tea.
Look into things like botanicares aquashield, it provides good microbes, which also help keep the slime under control. You might also want to consider products like hygrozyme, that get rid of excess living matter that has started to die in the system.