Dear Alberto,
I always read your comments with much intererest.
But I feel that this statement needs qualifying a bit more, as it is a very
interesting aspect when it concerns "bulbs".
Plants only use minerals when there is chlorophytic activity.
As for applying nutrients at the beginning of the cycle: the plants will
not use them, as long as they have no leaves. The plant uses its reserves to
create its structure. When the reserves become low, the plant should have
sufficient leaves to enable rebuilding its reserves by absorbing minerals.
When flowering takes place at the end of the cycle, leaves tend to
disintegrate and assimilation of minerals stops. In that case there is
little point of feeding the plant.
I look forward to hear, what the plant physiologists amongst will think.
Kind regards