I have several questions
I planted Clemson Spineless okra seeds at the end of May. It is now July and nothing has come up. What did I do wrong? I will be going away for about a week at the end of July. How can I keep my plants healthy while I'm gone, as there is no one around who can care for them properly? What is this on my cucumber leaf?
You should have seen your Okra germinating approx. 12 days after planting.
They prefer warm temperatures. It may have been to cold in the ground when you planted.
I would see if you can have a friend check on your garden while your away. You can also set up a drip irrigation system and have it set on a timer.
It appears to be a fungus or powdery mildew on your cucumber leaves. Damp weather conditions can invite fungus to our gardens.
Neem Oil is a good treatment.
Here are some links for you.