Nutritional Deficiencies in Palms

Nutritional Deficiencies in Palms



today we're discussing nutritional deficiencies and palm-trees and during this filming I'm going to show you several examples of palms showing specific deficiencies and try to tell you how to correct them palms is I've discussed earlier are considered to be heavy feeders they like a well-balanced fertilizer mix from their majors the secondary to the different minor nutrients and we're going to point out several of the main deficiencies they get but they also can get deficiencies of things like calcium copper and zinc which are not typically thought of as deficiencies the main deficiencies are with nitrogen potassium magnesium manganese iron and boron and that's what we're going to cover today our first tree is a queen palm here it's I a Gris Romans OFI annum and this tree here is showing a typical example of nitrogen deficiency with that usually the older leaves start to become yellow or light green first and then it moves up to the top where the whole tree becomes yellow and eventually the growth will stop as well I like the fertilizer mixes to have a balanced amount of nitrogen and potassium I say that because some of the new mixes are like an 8 to 12 or 8 for 12 and the nitrogen is not balanced with the potassium at Herald's we have a 11 for 11 and 13 3 13 where the nitrogen is balanced with the potassium this tree here as you can see the lower fronds and the upper fronds are pale and it's probably deficient in some other nutrients but nitrogen is the main thing going on here the next nutrient we're covering is potassium deficiency in palms behind me is a Phoenix Silvestri's it may be a hybrid and typically with Phoenix potassium and magnesium are their biggest issues and this palm is actually showing a deficiency of both but the way you can tell a potash deficiency is by the speckling and the leaflets and when it gets advanced like it is in this case the leaflets will actually turn brown or necrotic again as I mentioned earlier potassium and magnesium translocate readily in the plant so it's always seen in the old leaves for potassium deficiency I like our mixes that have at least 10 to 12 percent potassium our 11 for 11 or 13 3 13 is a good mix for that again I like nitrogen and potash to be balanced come in 4 to 5 times per year on a tree like this 4 to 5 pounds per tree also what this grower can do is use sulfur mag at the rate of 4 to 5 pounds in between applications because it's high in magnesium potash and sulfur the next nutrient deficiency in palms that we're going to cover is magnesium and canary island dates or phoenix canary answers are notorious for showing this and in the background here you can see one showing classic symptoms where the yellowing is in the lower leaves right here along the edges it also has some potassium issues going on as well and we're going to cover that magnesium and potassium deficiencies will always show up in the older leaves versus the new leaves because they translocate readily in the plant where iron and manganese don't translocate very well and that their deficiency is usually seen in the new leaf the correct magnesium deficiency is good to have a palm mix with 2 to 3 percent magnesium in it is usually put in the form of Epsom salts or magnesium sulfate sprays of epsom salts at 2 pounds per hundred gallons of water will also help correct the problem but ideally to correct any deficiency you have to have it on the soil and fertilizer egg you'll early at least quarterly with a good mix like an 11 for 11 or 13 313 magnesium is the nucleus of chlorophyll so without magnesium chlorophyll is not made that's what causes the yellowing our next nutrient we're covering is manganese and palms dual of manganese is one of the minor nutrients and typically in a high pH soil or a sandy soil that's low in manganese they will Romanies deficiency this is an advanced situation here typically in manganese deficiency the veins will start to turn brown on the new leaves and as it progresses it will get a symptom they called Frizzle top this is a very good example Queen palms prefer an acid soil where manganese is more available and this is a pH of about 8.0 here and Queen palms typically like all the nutrients from nitrogen down to boron but again this is a good example of manganese deficiency all palms need it it's good to have a pond mix with at least 1.5 to 2 percent manganese in it typically that's put in a manganese sulfate form when it gets this advanced you can still correct it through sprays of tech Mangum at the rate of 12 ounces of one-pound 400 gallons of water and you need to be on a regular fertility program using a field mix at least quarterly another minor element deficiency that we're going to talk about is iron when a palm is low and iron a deficiency symptom will be interventive chlorosis and the new leaves where the veins will be green and it'll be yellow in between I like the iron levels to be almost equal to that of manganese if not equal and being anywhere from 1 to 2 percent it's ideal to have iron and somewhat of a chelated form to make it more available also if you have an iron deficiency sprays of chelated iron such as sprint 330 are very effective and use them at the rate of 8 to 12 ounces per hundred gallons of water our Harold miner max is also quite good it has good levels of iron and manganese in it there's several others out there but again you want to have it in a chelated form the last nutrient deficiency we're going to talk about is boron behind me is a another Phoenix of estrus or if you notice the leaves are shorter than the old leaves meaning the expansions not good this technically could be a deficiency of cal Sims Inc or copper but I know it's boring because I did a leaf analysis on this palm and it came out to eleven parts per million boron will show up in Phoenix palms as well as other field palms typically in sandy soils where it's leashed out there's a fine line between a boron deficiency and a toxicity so you've got to be careful how much you use and typically in a palm X we like point O three to 0.06 percent to be added if you do have a palm showing boron deficiency spreads of soluble or at the rate of two ounces per 100 gallons of water will work harold's also has a great product called tropical mix plus boron and that's used at a corporal hundred it has one percent boron in it and some other miners in magnesium and it's been outstanding at correcting boron deficiencies you

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