Hmmm,

Looks like it's time for a chemistry lesson.

Boiling Sucrose will not convert it to Glucose.
However, if you add a small amount of citric acid it will.

Heating starch to ~160F. will convert it to glucose.
Boiling starch will cook it.

Plants produce sugars, but they do not uptake them.
That's why they need light.

And glucose in soil feeds mostly yeasts.

Just sayin.

Aloha,
Weeze