Fresh seeds inside US and Fast Shipping Shanghai Green Stem bak choy is known for its tender texture and a delicate and sweet flavor. Only takes 30 days to harvest young leaves. Great for container gardens too! Use them in stir fries, soups and more. To harvest bak choy, you can cut or pick the leaves from around the outside of the plant and leave the inner leaves to grow for later harvest. 50 Days. Customer Service: Your success is our success. If you feel like you cannot leave us a 5 star rating or if you have any issues with your order, like damaged or wrong items etc...just send us a note and we'll promptly resolve the issue for you. Free Shipping: Seeds are packaged in a small poly bag. In an effort to keep costs low, and pass the savings onto you, we do not offer specific planting directions on seed packets. If you cannot locate planting instructions for your specific conditions, contact us and we'll do our best to instruct you on the proper methods. There is no tracking number for economy shipping. Economy shipping order usually takes 1-2 weeks to arrive depending on the state you live. If you want seeds to arrive faster and safely with the tracking, it is HIGHLY recommended to choose USPS Ground Advantage.