Knowing that tomato vines, if buried, will root, I shoveled some soil on top of the bottom 16-18" of some of my tomato vines this spring after they got too tall and laid down, just for an experiment. I thought that more roots=increased nutrient uptake and might mean larger yield. They were still in their vegetative state and were not blooming nor had they set fruit. Today I noticed some red peeking from the soil where I had buried the vines. Subterranean tomatoes! Dug'em up and tasted a few next to above ground tomatoes from the same plant with the same apparent ripeness, based on color . The subterranean tomatoes seemed to be less acidic and more umami. The tomatoes were Oxheart.
This is really weird! But true! There will be more experimenting next year.
Just thought I'd share.
That's really interesting! I love Oxhearts but they take forever to ripen. Would love to hear back on the experiment.