Question: crops which are grown in summer season?
Answer: Lettuce. Keep on successional sowing summer lettuce varieties in July - August to give you a wide range of salads in Autumn.
Broccoli raab or 'rapini' ... 
Salad onions. ... 
Kale. ... 
Beetroot. ... 
Turnips. ... 
Fennel. ... 
Cooking radishes.