Wow! Your seedlings look great. I think they are right on time. In this heat/humidity you will find a narrow window for some of the vegetables to deliver produce. Tomatoes is the main one. The blooms will not pollinate with high humidity/temperatures. As a result getting them started early is excellent.
This link shows examples of shade cloth.
https://www.greenhousemegastor...
Depending on how it is rated it will cut a percentage of the sun.
On the shade house, I just built a framework and covered it with shade cloth. I have a lot of tropical/tender plants that will summer in there. It must be more pleasant because I will often find some of my pets in there also.
Plants in the garden will prefer morning sun. The evening sun in summer can blister the leaves and fruit. If you don't have evening shade on the garden spot, shade cloth can be used as a screen to provide some shady protection as well.
You may watch for warmer days/nights and start moving your seedlings out to "harden" them off. You may have to ease them into direct sunshine gradually as they will sunburn, Exposure to wind will help strengthen the stems as well. Just watch for frosty nights and move them back in for protection if necessary.
Will this be your first summer in Mississippi?
