I have two kumquats. Both are in promix, amended with perlite. When I removed the nursery soil and repotted in promix+perlite, I did NOT add any CRF.
Summer fertilizing was a bit erratic, because if they got rainwater, then I didn’t fertigate. Now that they are indoors for winter (since about November), I have been fertigating with DynaGro FP at the ¼ tsp/gallon rate. So, every watering, they get fertilizer.
I also have a limequat that is in whatever the nursery mix is, including CRF. Also been fertigating this since moving indoors .
My nordman nagami kumquat looks good, although the petioles are a lighter green than the leaf. Maybe that's normal?
My meiwa kumquat has small yellow spots on the leaves, and has dropped a few since coming indoors.
My limequat looks the worst, with yellowing from the base of the leaf, down the center. It dropped some leaves shortly after moving inside, then mostly stopped. But it is starting to drop again.
meiwa:
limequat
I know about spider mites; I am now seeing them on my naners, but not on the quats (yet).
The yellow spots on the meiwa are larger than what you usually see with mites, though.
So my questions are:
Should I fertilize at all over winter?
Are you supposed to use CRF
and the diluted FP?
Do these particular yellowing patterns tell me I have a specific nutrient deficiency? I’ve looked at a bunch of online resources and am not seeing these particular yellowing patterns associated with nutrients.
I've just learned a bit about pH, so in the past few months I have switched from my tap water pH 7.6 to rain or RO water at pH 6.0.