Cut your plastic canvas into six panels including two sides, two roof pieces, a front, and a back.
Stitch the outlines of each panel using light blue or pastel floss to form the greenhouse frame.
Fill in with rows of potted plants, hanging baskets, and vines. Then use French knots for flowers or berries.
Join panels together with whip stitches along the edges, forming a box-like greenhouse.
Attach the finished structure to a cork or wooden base using glue for stability.