Still lots of healthy looking leaves on the plants. From the photos your soil looks pretty dry, as in bone dry? That would be why they have all the crispy leaves. I would cover all the soil with a layer of the chicken grit/ pea gravel, so that no dirt can be seen. Lift each side of each plant as you are putting down the gravel/grit, making sure to get plenty under the leaves. After you have that done you can water deeply in the evening. Then let the soil rest. The gravel will keep moisture in the soil longer so you shouldn't have to water for a week maybe. Clay can hold a lot of water. With that much clay soil the gravel is important.
