Reflecting on the Psalms
Maybe their "wood" is old and clogged and unable to transport goodness. Plant have a use-by date, I guess.
In this case it is the old wood that is delivering and the new plants are struggling. I agree however that plants have a use-by date, even trees, I think in a day or two I have a shot of a tree I am worrying about right now. The landscaper told me it was on it's last legs 5 or 6 years ago so I guess I should be happy it has stayed on this long.