Hi.... just saw this thread. As a manufacturer there is some risk in getting involved in consumer threads, but, hey, we're a small company........personal interaction with our customers is part of what we do. We can either stay above it all or jump in and try to solve problems.
Poor results aren't something we're familiar with, so something is up. Initially it sounds like overfertilization. It's easy to do with seedlings and temps in the 80's.
The very first thing I would ask is.....do you shake the bottle well for 3-4 seconds before every pour? That is essential. Even more, if the bottle has been sitting for months, especially if it got cold/freezing, then you have to warm the bottle up and shake it for up to 3 mins. Then it will be good-to-go again. It looks very much like chocolate milk.
The second question is......have the rootzones dried out? This will concentrate nutrients to the point where it's the same as over-fertilizing.
Third......what size are these seedlings? Under 6" tall and you should only be running at 1/2 strength (1/2 tbls/gal), and only feeding intermittantly, say every 3rd watering.
The part about "It's difficult to overfeed with Urban Farm Fertilizers" only applies to a soilless medium and every irrigation is a full flush. In soil or containers you can only feed intermittantly, again such as every 3rd or 4th watering.
With larger plants, your eyes will tell you when to feed. We can only generalize on our instructions because situations vary so much. If you see deep green, prolific foliage, you know it's time to back off the food. When the vibrant growth begins to wane, it's time to feed again.
Hope this helps.....
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