I don't know what variety my sweet peas are (the young plants I bought just said 'mixed'. At first they seemed OK and are now about 9 inches high. But the plants look 'dried up' and as though they might be dying. They've been getting plenty of water, so I

I don't know what variety my sweet peas are (the young plants I bought just said 'mixed'. At first they seemed OK and are now about 9 inches high. But the plants look 'dried up' and as though they might be dying. They've been getting plenty of water, so I don't know why. Are they likely to survive?