How many seeds packs should start a RR?
The general concensus seems to be from 5 to 10 packs per participant. If all the seed packs are different then 5 packs per person should be enough. If you wish to put in duplicates then you would use the higher number.
So, if you have decided on a Round Robin with 15 participants you would need at least 75 different seed packs.
To keep it neat and easy for the participants to view, the seed packets may be grouped alphabetically in separate baggies for easier sorting, ie: Vegetables are separated out A-K & L-Z , duplicate seed packs may be grouped together. All of these separate baggies should be labeled appropriately, ie: vegies A-K, Marigold 'Naughty Marietta', Zinnia 'Green Envy'.