I have a few Lemon trees that I have started from seeds awhile back. Some of them are about 4ft tall now, but some of them are smaller and appear to have a manganese deficiency.
I looked online and could find information about manganese deficiency, but nothing really explains a way to treat the plant to get rid of the deficiency.
Any ideas?
- PunkRotten
- Greener Thumb
- Posts: 1989
- Joined: Sat Apr 16, 2011 8:48 pm
- Location: Monterey, CA.
Magnesium Sulphate....Epsom Salts...is a simple way of spraying the leaves to get Magnesium into the plant.
It would need a 'wetter' like a soap mixture added as the leaves of lemon are so waxy and would repel plain water spray.
I would add that this deficiancy can be caused by poor root growth through compaction or poor soil structure. Also high potassium will induce the difficiancy.
It would need a 'wetter' like a soap mixture added as the leaves of lemon are so waxy and would repel plain water spray.
I would add that this deficiancy can be caused by poor root growth through compaction or poor soil structure. Also high potassium will induce the difficiancy.
- PunkRotten
- Greener Thumb
- Posts: 1989
- Joined: Sat Apr 16, 2011 8:48 pm
- Location: Monterey, CA.
It's manganese.. looks identical to the pictures online.
https://hort.ifas.ufl.edu/database/nutde ... Mn-D.shtml
https://hort.ifas.ufl.edu/database/nutde ... Mn-D.shtml
- PunkRotten
- Greener Thumb
- Posts: 1989
- Joined: Sat Apr 16, 2011 8:48 pm
- Location: Monterey, CA.
What is the pH of your soil? Citrus likes slightly acidic but not strongly acidic or alkaline soils. Manganese deficiency usuallly occurs in strongly alkaline soils with pH above 8.5. Other deficiencies at that pH can cause chlorosis as well.
If you have organic soils most micronutrients are probably present but not necessarily available if they are tied up.
https://www.dpi.nsw.gov.au/agriculture/h ... ation/soil
If you have organic soils most micronutrients are probably present but not necessarily available if they are tied up.
https://www.dpi.nsw.gov.au/agriculture/h ... ation/soil
I don't know what the Ph of my soil is... but based on the pictures, I don't think they suffer from chlorosis. The leaves of the chlorosis affected plant in those pictures don't look healthy.
The ones on my plant look healthy, just aren't dark green, and have the same pattern as the ones on the site about manganese deficiency.
But I will test the soil just to be safe.
The ones on my plant look healthy, just aren't dark green, and have the same pattern as the ones on the site about manganese deficiency.
But I will test the soil just to be safe.
It is often hard to tell different kinds of micro nutrient deficiencies apart. They all cause some form or chlorosis to a varying degree and either on young or old leaves first.
Most of the problems can be relieved with a foliar fertilizer.
Usually pH should also be optimized. Extreme pH can make nutrients in the soil unavailable to plants.
https://www.dpi.nsw.gov.au/__data/assets ... encies.pdf
https://edis.ifas.ufl.edu/pdffiles/SS/SS42300.pdf
https://www.ipm.ucdavis.edu/PMG/C107/m10 ... igdis.html
Most of the problems can be relieved with a foliar fertilizer.
Usually pH should also be optimized. Extreme pH can make nutrients in the soil unavailable to plants.
https://www.dpi.nsw.gov.au/__data/assets ... encies.pdf
https://edis.ifas.ufl.edu/pdffiles/SS/SS42300.pdf
https://www.ipm.ucdavis.edu/PMG/C107/m10 ... igdis.html