Fine fruit!
Nice job! That's a good sized fruit. Usually you see home-grown pineapples half that size. What's your secret?
I use Acid fertilizer once a month
What's the NPK and brand? That probably mimics the acidic volcanic soil series. Hawaiian pros recommend a high N low P food with plenty of iron broadcast over the plants with large spray booms.
it's called Miracle-Gro® Water Soluble Azalea, Camellia, Rhododendron Plant Food its 30-10-10. I learned to start using it from Jude in hawaii the one who grows the kauai white sugarloaf pineapple..... so far since i been using it my plants have been doing great and getting huge like Jude said they would so they would be able to support bigger pineapples.....
but at first when i start rooting them i start them off with only Osmocote for the first 6 months for root growth only.... than after 6 months i start the acidic plant food... little bit gose's a long ways so you don't need much per plant