Posted: 26/01/2015 at 18:57
Most folk don't have a greenhouse placed in perfect full-sun conditions so if yours has a more shaded side, best grow your cucumbers there and your tomatoes in the sunniest area. As Edd says, they each like different conditions and are prone to different bugs/diseases. If you are unlucky enough to get spider mite on the cucs, the standard method of control is spraying them with water. Unfortunately that leads to high humidity and the tomatoes might then suffer from fungal problems. So, it's really a case of crossing your fingers and hoping you don't get any of the common problems!