Scientists have developed a breakthrough “superfood” for honeybees by engineering yeast to produce the essential nutrients normally found in pollen. In controlled trials, colonies fed this specially designed diet produced up to 15 times more young, showing a dramatic boost in reproduction and overall health. As climate change and modern agriculture reduce the availability of natural pollen, this innovation could offer a practical way to support struggling bee populations.
I think it probably has something to do with this:
(Source for the drawing: my ass)
As plants reach maturity, there’s less additional biomass accumulated year after year. At least that’s how i imagine it, based on animal growth. Like for cattle that’s true. They grow and after 6 months i think they already have like 50% of the weight of a grown-up animal? And if you let them grow for 10 years, they would only have twice the weight than after 6 months but you pay 20x the cost to keep them alive so it doesn’t pay off at all. That’s why they’re slaughtered early. I suspect a similar reason applies to plants and why they are eaten early.