Still only used soil this grow with no weekly nutrient feeds,A picture of the soil is posted in a comment above if that helps... Really tossing up what to do.. @InTheShed @Jon @Listersmeghead @Azimuth Like the old saying. " if it aint broke dont fix it". The other side of the argument is, just by looking at how green and healthy the left side plants are Maybe..im not pushing them to their potential. At the end of the day, I'm after Dense quality nuggies.
Your plants look pretty happy. Did you use that TurboDirt for the whole pot, or just the topdress? I'm not familiar with that product, but it says good to use with seeds and clones. However, ours is a pretty hungry plant so definitely keep your eyes open to building deficiencies.
Assuming you are giving pure water only with no nutes in it, that would suggest an organic grow which also means that fixing any creeping deficiencies will take a couple of weeks to begin to show any effect. You're about half way through flower (assuming your 27 day count is from pistils showing).
Feeding some castings teas wouldn't hurt anything and could help keep the soil topped up, but if this is your first grow with that soil I'd probably just see how far it could take the grow. The bag says water only soil, so maybe you
are good.
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Edit: OK. I just looked it up. Pretty broad list of organic inputs and says you can use water-only and good for a 9-10 week cycle, although plants with known needs should be treated accordingly.
So, most plants will not need supplemental inputs, but others may. Also says to make sure to keep your microbes topped off with regular additions of one of two products.
So, looks like you're likely good to continue on, just keep a good eye out for plants that look like they could use help. And be sure to supplement with additional microbes as the manufacturer suggests.