10-20 days. Non-GMO Borage microgreens seed is a moderate to easy microgreen to grow. It may just take a little patience but these borage seeds will produce immensely healthy microgreens with succulent stems. Looking for cucumber microgreens? You've found it. Borage has strong cucumber flavor--sometimes referred to as "the cucumber microgreen", even though they aren't related. Fast Shipping. Available in paper packet and bulk sizes.