I'm not sure that what you just posted is digestible w/o knowing the context in which it was offered. I'm guessing you were talking about very late season fertilizing - after soil temps had dropped below 55*. You might want to post a link to the thread or copy paste it here to help eliminate confusion.

I use 0-10-10 on some plants late in the year when soils are cold, but it's a soluble fertilizer, not fish emulsion. I usually mix it with other fertilizers to insure adequate P&K but low N delivery.

You really don't need anything beyond a 3:1:2 or a 1:1:1 fertilizer for their P ("bloom-boosting") content. Both those blends have more P than the plant actually can use (in relationship to the N delivered).

Al

Sorry it took so long Al. This site was down. filix.

like a regular dose of 30-10-10 around Sep 1, 0-10-10 on Sep 15, a half dose of 30-10-10 on Oct 1; then, another dose of 0-10-10 on Oct 15 and again on Nov 1 as the last dose if the weather is still warm & the plant is growing. Last year & the year before, I was still picking cherry tomatoes on Nov 1. Go figure.
If you're using Pro-TeKt, there are other strategies you could use, too.

Al

I have some pro-tekt. But I haven't used any on my blueberries. Could I use that? or the 0-10-10 I bought? Thankssssss. filix.