Personally, I associate vigorous with overall size and speed of the plant's growth rate, with or without fruit set.

Heavy production ,in my short growing experience, is somewhere around 20 pounds of fruit. Small or large.

Take care,
Travis

Production is usually in terms of lbs. of fruit rather than number of fruit. 20 lbs. is a good approx. seasonal average production so quite a bit more would be "heavy" and quite a bit less would be "light".

I tend to use the labels excellent, good, and minimal when describing production in my notes.

Vigor in plants means more than just plant size to me - includes over all health, color, well spaced nodes, leaflet number and size and shape, diameter of secondary stems compared to primary, etc.

Dave

Thanks guys! This is all more complicated than I thought. I don't have a kitchen scale & have never weighed food. Do you weigh your harvests or guestimate based on average size in ounces/lbs & production. Plant vigor other than size makes sense although I don't know anything about leaflets & nodes. But, certainly understand about color, stem comparisons & disease resistance (or lack thereof). Thanks for the info, as I'm keeping track of my plants performances for next year's roster.

Just bought a small scale this yr expressly for tomatoes. My biggest so far is one pound but I have several that are quite a bit larger but still green. I was surprised how big a tomato had to be to weigh a pound. The avg large supermarket tomato weigs about 12oz. Also tickled with the size of Burpee Sunny Boy....first time growing this one and it is a dandy, hybrid or no. Porterhouse ditto!