| Hi ancfan... it's caused by too great a variation in watering or water available. I've found tomatoes like to be kept on the dry side. |
Here is a link that might be useful: An English Allotment Garden
| You'll find several discussions on "cracking" and how to prevent it as well as info on varieties that are more prone or more resistant to the problem over on the Growing Tomatoes forum here (linked at the top of this forum page). I linked a couple of them below. Preventing cracking is one reason why many of us prefer to pick at the blush or break stage and ripen inside. Dave |
Here is a link that might be useful: Cracking tomatoes discussions
