Leaves develop a mottled appearance and growth virtually stops. Leaves dry out and turn crinkly while veins stay green. Stems become torn with brown tips and leaves become spindly. Leaf veins turn yellow and leave become very dark near the stem of the plant. Leaves turn brown with dark splotches then yellow and they curl up. Leaves turn yellow and develop brown spots but leaf veins stay green. Long-term deficiency stunts growth and causes poor root formation. New leaves never develop and stay small and dry. Long-term deficiency results in poor root formation. Leaves turn a dark green or grey with blotches. Leaves turn a very light color and start to turn yellow starting at the base of the plant first. That is the reason for the following table showing symptoms of plant nutrient deficiency, nutrient by nutrient. When you build your system and something like this happens maybe you will be a little better prepared than I was. What I had was most likely a phosphorus and nitrogen plant nutrient deficiency. Next, I thought ‘disease’ but really couldn’t find a match for the symptoms.įinally, I realized the problem began right after changing the nutrient water so I changed it once again, being careful this time, and my plants slowly turned healthy. First I thought some pest found my plants but could not find any indications of one. Of course, I had no idea what was going on. After changing my nutrient water my once-thriving plants slowly started showing dark green leaves with splotches and all the lower leaves which started turning yellow. I know this from experience … In fact, I had to learn this the hard way when running my first hydroponics system. It is all too easy to ‘forget your count’ when adding teaspoons of nutrient mix to water and accidentally ‘short changing’ the plants. Homemade hydroponic systems are especially susceptible to a plant nutrient deficiency.
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