Got near a hundred mini watermelon this year, the very late ones were no good but for a couple months they were glorious. Mini love variety, it was a brutally hot summer and they flourished, I let them take over the whole garden.
Two plants survived being overrun by watermelon, the asparagus and the hong tsoi. I'm sort of resting it until "spring" which is planted around Feb here.
Do they do well in hydroponics?
No watermelon does really well in hydroponics. They can tolerate it but they don't really like it.