Very interesting thread this one. I have experimented many times with liquid fertilizer after repotting on a myriad of genus.Keels wrote: ↑October 23rd, 2020, 7:26 am Gav, I re-potted my Grevilleas two weeks ago and everything was going so well so I thought I'd fertilize them......I like to push the boundaries with my fertilizing but looks like Grevilleas like to push that extra fertilizer to the tips of their leaves.... such a rookie mistake the tips have all gone brown and the 85% of leaves have fallen off. There is still hope some might pull through
Now I simply don't use liquid fertilizer. I prefer slow release fertilizer.
However if it was me I would wait at least about 6- 8 weeks after a root prune before you use liquid fertilizer.
Some people say you can fertilize straight after a repot, but I don't find this to be safe.
I have lost or badly set back many Melaleuca and Leptospermum from fertilizing too soon after a root prune. The ones that don't get fertilized afterwards fair much better and recovered quicker.
Perhaps the new roots that grow are too sensitive to liquid fertilizer and can't tolerate it.... not sure, but I do know the statistics fair much better if you wait.