Solving Problems With Your Tomatoes

(This is an expert from a post. It didn't make sense to post the entire thing here. Read more at the link below.)Cracking
Irregular watering can be a real enemy to tomato plants and cause the skin of the ripe/ripening tomato to crack. As much as possible, you should keep your tomatoes on a regular watering schedule and stick to it. Obviously you can’t control the weather, but mulching around your tomatoes will help keep the soil moist. I’ve also read that over-fertilizing can cause cracks. (As a side note, over fertilizing (especially with a fertilizer high in nitrogen) can also cause a lot of vegetation growth without any fruit being produced.)Blossom End Rot
This is the first year that I haven’t lost any tomatoes to blossom end rot. For one thing, I’m not growing a bunch of heirloom varieties (sadly, this is mainly due to the move that we experienced in November). I’ve been told that it is not abnormal for the first few heirloom tomatoes on the vine to experience blossom end rot, while the rest of the subsequent tomatoes will ripen beautifully. This problem is primarily a result of the root of the plant being unable to transport sufficient water and calcium to the ripening fruit. The best way to prevent this is to have warm, well-drained and well-aerated soil. I’ve also read that a fertilizer lower in nitrogen and higher in phosphate will be helpful in the long run.
Sun Scalding
I’ve had this problem affect my tomatoes on occasion. Green and ripening fruit can be very sensitive to hot, direct sun. Protect plants from intense sun rays if possible. A sun scorched tomato is still edible but the scorched spot (evidenced by a light or white patch on the tomato that occurs on the side of the tomato that is most exposed to the sun) should be cut off, as it won’t be pleasant to eat.
Greenbacks/ Green Shoulders
When the tops of your tomatoes (the part of the tomato surrounding the stem) stay green, this condition is called greenback. It is caused by high temperatures and/or too much exposure to sunlight. As with sun scalding, protecting your tomatoes with screen or some other fabric that will reduce its exposure to intense rays should help.