Identify creamy white particle growing on pot's rim

[S.Ahmed]

[Izhar]

Seepage appear on coated pots, these are salt accumalation

[S.Ahmed]

So should I simply wipe it with wet piece of cloth ?

Out of 4 similar pots its only appearing on rim of two pots, I used different paints on the other two non effected pots. Or maybe pot maker must have used salty ground boring water to produce these 2 pots while other 2 pots must have been made from normal line water.

Secondly I want to ask about those spent flowers that dropped from plant in 2nd pic. Can seeds be harvested from them? How?

[Izhar]

No, Hibiscus form seed pods, check google for hibiscus seed pods and you will get to know from where you can harvest the seeds...