Correcting Iron Deficiency for Camellia
westes Zone 9b California SF Bay
2 months ago
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westes Zone 9b California SF Bay
last monthlast modified: last monthwestes Zone 9b California SF Bay
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Iron deficiency in container pepperocini
Comments (4)The plant looks fine, although rather immature (still small compared to a fully mature plant). Indoors is going to be tough and I think your plant will be limited by insufficient light rather than insufficient nutrients. The fertilizer you are using is not necessarily "high" Nitrogen - it's actually high Phosphorous and Potassium. At this point, I'd actually increase the Nitrogen to keep the plant growing. Peppers will flower long before they're ready to set pods. Most often, the early flowers will abort - but many of us will remove early blooms in order to keep the plant in a vegetative state (until it is of an appropriate production stature). Chlorosis would look much different. I recommend googling for images of iron deficiency. Josh...See MoreIron Deficiency in some rose varieties
Comments (24)Greenhaven, your other questions. Nitrogen is transient in the soil. It stays put as part of insoluble proteins until they are converted by bacteria to soluble urea (months/years). Then it passes into ammonium and finally nitrate. Unused nitrate washes out of the soil. But in natural systems it is almost all taken up and recycled into proteins. Organic ferts contain slow-release N mainly in protein form. Potassium binds lightly to clay and decayed organic matter so it doesn't wash away. K in fresh organic matter is soluble and no different from manufactured sources. In mixed organic fertilizers, K is usually supplied by inorganic potassium sulfate. Phosphate binds to clay. Also, it readily forms insoluble compounds with Ca, Mg, Zn, Cu, and Fe which don't wash out, and which can reduce availability of trace elements. In fresh organic matter and manure, there are organic P compounds that need to be broken down by bacteria. Bone meal and rock phosphate contain insoluble phosphates that must be cracked by acid to become available to plants. Superphosphate is soluble and plant-available, but it converts to insoluble substances over a period of weeks and stays put. I don't think there's a difference between organic and inorganic ferts in the buildup of P and K. It just depends on how much excess potash and phosphorus we throw at the roses over the years....See MoreChelated Fe to correct Fe deficiency
Comments (3)Oh, guess I should have read this post before my response to the one above. Yes, foliar chelates are another option and the timing sounds right. But I don't deal with a lot of foliar applications for micros to be quite honest so take that opinion for what it's worth. It does look like your manganese and iron are both pretty low. Based on the other numbers I see there and taking into acount the extraction method for micros (I like dtpa for calcareous soils too, although I'd switch out the Mehlich 3 for Olsen Bray bicarbonate method for phosphorous) I'd say you would want manganese and iron at about 10 and 50 ppm, respectively. It would also be interesting to look at a foliar analysis for manganese. I wouldn't bother with iron in the tissue, unless it just comes as part of a testing package. Foliar analysis can't differentiate between Fe2+ and Fe3+. The plants will take up Fe3+ but they can only metabolize Fe2+. It's very common to see "sufficient" values returned for iron in plants that are clearly iron deficient....See MoreIs this phosphorous deficiency in my blueberries?
Comments (12)It's a reaction to cold. It is much too soon for such recently planted shrubs to be showing a nutrient deficiency. Just an FYI, but blueberries are more tolerant of a range of soil pH than most sites will admit. As long as the soil is adequately acidic, they do well. Local soils are nowhere near the 4.5 - 5.5 pH so often recommended (more in the 6.0 - 6.5 range) but they thrive here, as countless commercial blueberry farms will attest to....See Morewestes Zone 9b California SF Bay
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