For those who do not grow this easy plant in their yard, you are missing out. Morning Glory is a very common ingredient in fried beef, pork, and chicken easy meals, this can be grown in your yard and used as often as you like.
The alternative is buying this is Tesco (25 Baht for a small bunch) or from a fresh market which is less, but takes time to get to a grocery store or market.
If you pick out a spot in your yard, plant some, it grows rapidly, endless supply of food. If it gets too big, cut it all back and it will grow out again. You can enjoy this for years, at less than 25 Baht investment.