I am thinking of trying Snow Princess Alyssum both in pots and in the landscape but have no clue as to the amount of seeds to order. I have a large bed to fill and several pots that I will do mixed plantings in. I would like the pots to look like the photo I've uploaded. How many seeds would I need to order to fill one like this? Best place to order seeds in bulk? Also, I wondered if Snow Princess reseeds?