The acclimatization of a tomato variety to a particular area may or may not be a major factor in how that variety performs. With most of the better known varieties in the US there will be little variation within the US. I do experience considerable loss of quality, however, when growing out seed from my Aussie buddy, Steve Parton. When a variety is grown under different soil or climactic conditions than those to which it is accustomed, there may be a loss of flavor, size, production or all three. If the seed is saved each year and planted again there is often a reversion to the original state. This will usually happen in one or two generations and is known as acclimatization. BTW my list of new 'maters for '99 is complete and all who would like a copy please send your name and address by E mail or other secure method. Good gardening, Chuck Wyatt