Added by on 2019-01-27

Today, Ethan Walter discusses nutrient deficiencies: what they are, how to identify them, and how to treat them. A nutrient deficiency occurs when a plant is not getting enough of a nutrient for the normal plant functions. Common deficiencies are N, P, K, (three of the macronutrients), and Ca, Mg, and Fe. In previous videos like this one (, you learned that nutrients are measured in water with a number called EC. EC is a very useful number, but it doesn’t tell you what *ratio* of one nutrient to another is. If you have the wrong ratio of one nutrient to another, you could be reading the EC as sufficient, when a certain nutrient is actually too low. Deficiencies are identified by their symptoms. Some common deficiencies are chlorosis, necrosis, and stunted growth. The pattern that those symptoms occur in are important. Pay attention to where symptoms occur, whether it’s on new or old growth, and what combinations symptoms occur in. Plant nutrients are categorized as either mobile or immobile in the plant. Mobile nutrient deficiencies occur first in older growth, and immobile nutrients occur in younger growth. A plant deficiency key is a useful tool for farmers to identify deficiencies. If you’re still having trouble, consult with your local extension agents. Google is not a great way to ID deficiencies unless it’s from a peer reviewed source Treat deficiencies by supplementing the nutrient that is lacking. You can supplement through your nutrient reservoir or foliar feeding (but be careful; high concentrations can burn the foliage and ruin a crop). Consider making regular supplements or switching suppliers if the deficiency occurs commonly. Here are some common deficiencies and diagnosis tips: Nitrogen is the “green up” nutrient. Nitrogen is mobile, so it will affect older growth first, and will cause total […]

Leave a Reply

Your email address will not be published. Required fields are marked *




  • DragonFly Turner 3 months ago

    you take a lot of time to drop a little knowledge

  • yo guy 3 months ago

    I think I have iron deficiencies can I send u a pic to confirm if I was right or if it's a different kind

  • Nick Burke 3 months ago

    Very useful especially with the difference in magnesium vs nitrogen. I would of diagnosed some of my young ghost peppers as N deficient however your note that Mg tends to cause whiteness of the leaf is more consistent with what I am seeing.

  • Tristram Credland 3 months ago

    Btip for this video, take a bit of time find plants with said deficiency and show it

  • Devon Jefferson 3 months ago

    Great vid but we need pictures !!!

  • jim beam 3 months ago

    what you say makes sense . i will use this to correct deficiencies via supplements thanks!

  • jim beam 3 months ago

    do you have a link to the nutrient deficiency key ? not sure what im looking at when i go to montana states webpage thnaks!

  • Estreya Enquist 3 months ago

    686 yeeeah

  • Carl Lindenlaub 3 months ago

    Shit, is this video still going?? Fell asleep for few minutes. Picking up green spray paint tmrw and a book to read for the next video 😉

  • MrTwisted 3 months ago

    This was a very thorough video on deficiencies and very good explanations of them, which is more than most do in their videos. But one thing I have yet to see anywhere is a 'completely' thorough and very specific "show-and-tell". Just like if it were a study done at a University or a science project. Where if you have a few examples of a control crop with no deficiencies, a very healthy plant. Then you have a couple of the same type of crops of each deficiency, that were purposely insufficient or withdrawn from the feeding schedule. (e.g. one crop purposely given insufficient amounts of Nitrogen, another insufficient amounts of Mag, etc.) This way you would have a few examples that were very specific and apparent. Also, where some of the examples would have multiple deficiencies that are common together do to lock-out, such as a pH lock-out or other. I feel that video would easily get millions of views and become the "go-to" for everyone who has questions in the subject. Just sayin 🙂

  • jenny zoremtluangi 3 months ago

    wonderful and simple explanation of deficiency in plants….thanks for the awesome video

  • Darin Hibbs 3 months ago

    well done…

  • saturn D'great 3 months ago

    Where to get these specific nutrients? Are human suppliments can be use as a substitute for it?

  • Ullimately 3 months ago

    Dude, what a lousy video, lots of chatting loads of words very few images.
    If you describe a disease or a leaf defect then PUT IN AN IMAGE of it. Just rattling on and on and describing 10 leaf defects in five seconds just doesnt cut it.
    And dude, get rid of that dead animal on your head. It doesnt help you making better videos.

  • james jezinvedn 3 months ago

    Fake,plastic garden,that's why there's deficiencies.

  • james jezinvedn 3 months ago

    There you have it folks…from the horses mouth,"nutes" kill plants,anyone who engages in hydroponics is dumping bucket loads every week into the environment with little if any care for the harm you're causing .

  • carlos osorio 3 months ago


  • SuperDan 3 months ago

    Am I the only one that thought this was for Human nutrient deficiency and not plants? lol

  • delosombres 3 months ago

    The question is how to diagnose specific nutrient toxicity or overload?