Good tip, especially for container-grown tomatoes. And if you can't find dolomitic lime then just regular garden lime (or agricultural lime) will do.
Lawn grass lime is often dolomitic in my area but it'll depend on your location in the States if it is the same where you are. Lime is needed because tomatoes need the extra calcium that lime gives. Unlike garden lime/lawn grass lime/agricultural lime which strictly offers calcium, dolomitic lime (or dolomite) offers both calcium and magnesium making tomato plants happy campers!
If your area is lacking in magnesium in your soil go with dolomitic in your gardens; if not just use "lime". Back to container gardening of tomatoes, like PSA mentioned above most potting soils/mixes don't offer any form of calcium so the addition of lime is necessary, especially to stave off BER (blossom end rot).
Shoe
