Fragaria vesca. Yellow Wonder Alpine strawberry seeds are a bit easier to start than some others. Start the seeds indoors as early as December, and transplant outdoors one week after your last average frost date. That's around the first or second week in April. With this kind of head start, the plants will produce fruit in the first year. Yellow Wonder has the lovely oblong shape of alpine types, but with yellow skin and flesh and incredible sweetness. The plants are low growing, but very productive, even in containers. The seeds can also be sown later in the year, but plan on harvesting berries from the second year of growth forward.