I like to purchase seeds from High Mowing for plants that I find difficult to grow.
Features:
1) They have some great hybrid choices for vegetables and herbs. I use a lot of their seeds for the Brassica Family and Basil.
2) High Mowing sells all organic seeds and seed potatoes.
3) They also have some nice choices for cover crops and flowers.
4) Most of the seed packets cost more as in above $4.00.
5) High Mowing offers free shipping in the U.S. only when you spend over $200! They have different rates depending on the cost not the weight. For instance, orders under $10 incur a $5.95 and from $10 to $24.99 incur a $7.95 standard shipping charge and so on.