Quote:
Originally Posted by Bud
dampening the roots before fertilizer is helping the nutrients be easily absorbed by the roots.....its a process of osmosis it takes longer for the fertilizer to be absorbed if the roots are dry.
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I've actually heard the opposite, but I don't really know.
What I heard is that in 'the old days' fertiliser concentration was much stronger than we use now. As a result it would 'burn' the roots. Dampening the roots before fertilisation
reduced the absorption of the fertiliser because the roots were already 'full' and so only a little seeped in, thus stopping root burn.
If the roots are dry they are like dry sponges and pull in a lot of the water/fertiliser mix very quickly, if the fertiliser is too strong that means they absorb a lot of fertliser and can burn.
My understanding was that the idea of not fertilising dry roots is outdated now that the fertiliser concentrations recommended are so much lower. In fact I've heard is said that they SHOULD be dry, otherwise they don't absorb enough of the fertliser.
Don't know which is right, but I've fertlised with every watering on dry roots since I started growing orchids and so far it seems to have worked fine.