FYI -- I did an experiment where I laid down sulfur at the rate of 4 tons per acre, dropped the pH by 4 units, and the 30+ trees in that soil were fine. Only lost a couple of annona.
My carambola went from horribly chlorotic and unproductive to beautiful green, vigorous, and insanely productive after dropping the pH from 7.5 to 5.x with sulfur. Earthworms were unaffected.
one unit of ph movement with sulfur a season per soil makeup or can burn plant and harm soil life! looks like lack of mg. but id use a good micro foliar spray, also they get winter induced deficiency soil temps below 70 which will reverse when temps go up in spring, hard to correct in winter
how would one go about targeting a few plants with sulfur ?
My carambola has always looked sick.
i have lots of papaya, guava. mango, citrus, and a dozen others
the one that always looks deficient is the starfruit.
its been in the ground for about 2 years now
ive added a ton of leaves, grass clippings, pine bark mulch, yard waste...
it doesnt seem to help.
the plant does give me nice fruit, but, im sure it would be more productive
if the leaves were nice and green. it hasnt grown very much either.
i did give it 2 very light iron treatments which havent seemed to help much.
the soil is river sand mostly (Mississippi river) which is fine and has some silt to it.
PH is normally just above 7 i think.
the tree is next to a pond where i had yucca growing years ago.
i was hoping it would find some old roots to grab nutrients from.
i do not like chemicals, so i use fish emulsion and worm castings on everything.
i have an emergency backup of some organic fertilizer in a bag,
it has micronutes in it also , i tried once with no luck.
i would think it should get what it needs from fish emulsion and worm castings.
i am now thinking it must be PH ?