1) how to use the Marigold. I can put it in a vase, but how do i obtain petals?
There are some flowers that can be grown in two places, such as Marigolds. If you grow them in the SF Planter you will get flowers that can be put into flower pots/vases etc. If you grow them in the SF Physic Garden then you will get petals. You can find what produces what (and where it is stored) on the page
quintonia.net/information/user-guide/products
2) bags of hemp, I cant seem to find the correct storage for that, is it for making rope or something?
This is stored in the SF Dried Goods Store. You may need to pick that up from New Items area in the Mintor store as it's not part of the main system at the moment. It is in the next release (Q3)
3) cannabis - it wont send to Herb Bench, not sure what else to do with it.
Cannabis is stored in the SF Cold Frame. It can be turned into SF Pot on the SatyrFarm Drier. Again this is something coming in the Q3 release.
4) coconut - not sure where to store it.
Stored in latest SF Kitchen Storage.
5) the SF Table has disappeared. leaving only the place settings and chairs. I rezzed another, it did the same

Very odd! There is a menu option for any 'surface' items such as the table to follow you so not sure if it is doing that somehow? Also worth checking the config notecard as there is an option to have some things expire and it may have got set somehow.
Glad you are enjoying it all. I am gradually putting together more comprehensive documentation!