Just a bit of advice, do not manure area where you are planting Carrots - they don,t like it, it will make them fork. Also you say you want to grow Potatoes and Tomatoes - keep them away from each other, as they are members of the same family they are both susceptible to Blight and if one gets it, it will transfer to the other. One way around this is to grow first early Potatoes which are ready to eat in June - Blight is not a problem until July. First earlies will give you New Potatoes which are expensive to buy, whereas Main crop Potatoes are cheaper. I don,t mean to put you off Main crop Potatoes - I grow both myself, but space is limited, if you go for Main crop then spray them to protect against Blight.
Best of Luck
Hammer
