Seems it does do that. One year tomatoes grow like mad and the next it’s squash and zukes that go nuts while tomatoes suck.Not really... When I get plants and veggies that do well in Montana... I save the seeds from the hardiest plants... But it seems every year there is something that just does not grow well. Not just at my place but through out the region. One year it may be corn and the next year it may be tomatoes.