Don’t lose seedlings or transplants to too much sun! Just make a protective panel, like the one at left, with a piece of shade cloth and a section of coated wire fence.
Cut the amount of cloth needed to cover the area, and then cut a piece of wire fencing that’s 2 inches wider on all sides. Lay both of these flat, with the fabric pulled taut on top, and then fold the cut wire over the cloth’s edge. You can even poke each wire through the fabric and bend it back, so it lays flat against the rest of the fencing, so the two are attached on all sides.
Then stand, lean or prop your shade panel around a planting or wedge it between edging for instant coverage — it’s easy to move around as needed.