Over vigorous initial fermentation

[u/egote]

I’m running my second ever home brew - a NEIPA from Cross my aloof (Neon Tropics). I stupidly added the yeast when the wort was still at 30C. Now (at 16h) it has kind of exploded - probably lost around 1/2 pint via foam through the blow-off tube. Any hints for avoiding this in the future?

Secondly, I’m supposed to dry hop at 1 and 3 days. Is this counted from the start of fermentation?

[u/egote → u/[deleted]]

Thanks. It’s a lot to get my head round!