Fresh offerings every night?

Hi everyone. I am new to witchcraft and have decided to try to build a relationship with Sitri, with the hope of eventually petitioning him for love, lust, attractiveness, self love, etc. I have drawn his sigil and started lighting candles every night and placing offerings of “romantic” herbs (rose, cinnamon, hibiscus) on his sigil while meditating and chanting his name. I think it is going well so far, last night I was able to get into a powerful trance while staring at the sigil. My question is, should I add fresh offerings on the sigil/altar every night, or would it be acceptable to leave those herbs there and keep using them? My plan was to bury the herbs after 11 days, in my reading so far I keep seeing the numbers 3, 5 and 11 stated as the amount of days/nights to repeat a ritual for. Any advice is appreciated, thanks.