Green marks on the undersides of my stromanthe triostar- what’s wrong?
Emelie Paul
3 years ago
last modified: 3 years ago
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Pruning Ficus Lyrata (fiddle leaf fig)
Comments (646)Hello everyone! I think from everything I've read in this thread that my plant has been suffering from overwatering and/or soggy soil. I got it in late January and after my second watering it developed a few very small brown marks on the edges of the leaves. Suspecting over watering as the cause, I let it dry out (until it no longer felt damp and spongey through the drainage hole) before watering again. This process meant it was about 2.5-3 weeks between watering and sadly the brown and blackish spots on the leaves have continued to get worse after every watering. With what I've read I now believe the soil is just staying soggy too long. (FYI when I water I give it about 3 cups, allowing one cup at a time to soak in. At least half a cup flows out the drainage holes on the third cup of water.) My plan now is to repot with a soil amendment and a wick. I'd like to do some root pruning as well since I can barely get the moisture meter in the soil through the roots, but I think I read in a previous post from Al that I should wait until it starts growing again and the weather is warmer. In the mean time, will mixing my regular potting soil with perlite as well as adding a wick offer a noticeable improvement for drainage for now? Then in the summer I can source better soil mix components and address any potential root issues? Alternatively, I can just water with more frequency and use less water until summer? Here are some photos of the FLF in the late afternoon on a cloudy day. This plant lives about 3 feet away from a S/SW window and doesn't receive any direct sunlight. Here is evidence that the plant has dropped a few leaves. The six leaves that fell off were the worst looking, and the leaves with the spots (shown above) are headed in that direction. And here is the beautiful new growth since I got it in late January (though now it has stopped and the tiny bud here doesn't seem to have changed in about a month): I look forward to learning even more, so thanks in advance for your advice and expertise :)...See MoreLots Of small brown Dots on fiddle leaf fig - Ficus lyrata
Comments (52)The larger holes/damage in the small leaf you're holding look like mechanical injury - what would be akin to a bruise to a human. The spots on the underside of the leaf are oedema. I've written about that & I'll leave something about it at the end of my post. Usually the driving cause behind its occurrence is over-watering, but there are several cultural contributes that can also cause or exacerbate the malady. Using a "tell" to tell you when it's time to water will help you determine what moisture conditions are deeper in the pot. I'll also leave something about that, below. If you have interest, there are some other things that can help alleviate the impact of excess water, which causes a dearth of air in the soil, which causes limited root function and poor root health. Just ask if you have interest. FWIW, I'd guess that over-watering is directly or indirectly responsible for the overwhelming % of requests for help on all fora with strong connections to container growing. Oedema Oedema is a physiological disorder that can affect all plants. It occurs when the plant takes up more water than it can rid itself of via the process of transpiration. The word itself means 'swelling', which is usually the first symptom, and comes in the form of pale blisters or water-filled bumps on foliage. Under a variety of circumstances/cultural conditions, a plant's internal water pressure (turgidity) can become so high that some leaf cells rupture and leak their contents into inter-cellular spaces in leaf tissue, creating wet or weepy areas. Symptoms vary by plant, but as the malady progresses, areas of the leaf turn yellow, brown, brown with reddish overtones or even black, with older damage appearing as corky/ scaly/ ridged patches, or wart/gall-like bumpy growth. Symptoms are seen more frequently in plants that are fleshy, are usually more pronounced on the underside of leaves, and older/lower leaves are more likely to be affected than younger/upper leaves. Oedema is most common in houseplants during the winter/early spring months, is driven primarily by excessive water retention in the soil, and can be intensified via several additional cultural influences. Cool temperatures, high humidity levels, low light conditions, or partial defoliation can individually or collectively act to intensify the problem, as can anything else that slows transpiration. Nutritional deficiencies of Ca and Mg are also known contributors to the malady. Some things that can help you prevent oedema: * Increase light levels and temperature * Monitor water needs carefully – avoid over-watering. I'd heartily recommend a soil with drainage so sharp (fast) that when you to water to beyond the saturation point you needn't worry about prolonged periods of soil saturation wrecking root health/function. Your soil choice should be a key that unlocks the solutions to many potential problems. * Avoid misting or getting water on foliage. It slows transpiration and increases turgidity. * Water as soon as you get up in the AM. When stomata close in preparation for the dark cycle, turgidity builds. If you water early in the day, it gives the plant an opportunity to remove (for its own needs) some of the excess water in the soil. * Put a fan in the room or otherwise increase air flow/circulation. Avoid over-crowding your plants. Using a 'tell' Over-watering saps vitality and is one of the most common plant assassins, so learning to avoid it is worth the small effort. Plants make and store their own energy source – photosynthate - (sugar/glucose). Functioning roots need energy to drive their metabolic processes, and in order to get it, they use oxygen to burn (oxidize) their food. From this, we can see that terrestrial plants need air (oxygen) in the soil to drive root function. Many off-the-shelf soils hold too much water and not enough air to support good root health, which is a prerequisite to a healthy plant. Watering in small sips leads to a build-up of dissolved solids (salts) in the soil, which limits a plant's ability to absorb water – so watering in sips simply moves us to the other horn of a dilemma. It creates another problem that requires resolution. Better, would be to simply adopt a soil that drains well enough to allow watering to beyond the saturation point, so we're flushing the soil of accumulating dissolved solids whenever we water; this, w/o the plant being forced to pay a tax in the form of reduced vitality, due to prolong periods of soil saturation. Sometimes, though, that's not a course we can immediately steer, which makes controlling how often we water a very important factor. In many cases, we can judge whether or not a planting needs watering by hefting the pot. This is especially true if the pot is made from light material, like plastic, but doesn't work (as) well when the pot is made from heavier material, like clay, or when the size/weight of the pot precludes grabbing it with one hand to judge its weight and gauge the need for water. Fingers stuck an inch or two into the soil work ok for shallow pots, but not for deep pots. Deep pots might have 3 or more inches of soil that feels totally dry, while the lower several inches of the soil is 100% saturated. Obviously, the lack of oxygen in the root zone situation can wreak havoc with root health and cause the loss of a very notable measure of your plant's potential. Inexpensive watering meters don't even measure moisture levels, they measure electrical conductivity. Clean the tip and insert it into a cup of distilled water and witness the fact it reads 'DRY'. One of the most reliable methods of checking a planting's need for water is using a 'tell'. You can use a bamboo skewer in a pinch, but a wooden dowel rod of about 5/16” (75-85mm) would work better. They usually come 48” (120cm) long and can usually be cut in half and serve as a pair. Sharpen all 4 ends in a pencil sharpener and slightly blunt the tip so it's about the diameter of the head on a straight pin. Push the wooden tell deep into the soil. Don't worry, it won't harm the root system. If the plant is quite root-bound, you might need to try several places until you find one where you can push it all the way to the pot's bottom. Leave it a few seconds, then withdraw it and inspect the tip for moisture. For most plantings, withhold water until the tell comes out dry or nearly so. If you see signs of wilting, adjust the interval between waterings so drought stress isn't a recurring issue. Al...See Morehey Fred and Russ (Aglaonema thread)
Comments (120)I can't tell what it is, if it's clear then it's not mealies. But the stuff on the plant looks white, so maybe a better pic would help. I don't think mealies are that bad, actually. While I don't like chemicals, there are systemics that will clear them up fairly quickly. I don't see them very often and I stay on top of that kind of thing. I'll sometimes unpot a plant and spray the whole thing, roots and all, with a fine, hard spray from the garden hose. Have to be sure to get down in the space where the petiole attaches to the stem. But that usually does the trick....See MoreIs it easy to care for calathea?
Comments (94)my zebra plant dropped the top 2 new leaves!! I’ve been keeping it moist and I know it is moist because the water keeps draining of out the pot. Then yesterday, I withheld some water because I thought I might be overwatering this plant because the tips are turning brown and the leaves are yellowing. Not sure if it’s due to the pesticide but it’s an organic pesticide so it shouldnt i guess. So I thought maybe I overwatered. The soil is still moist throughout the day but it suddenly dropped 1 new leaf. then I watered and this morning another leaf was dropped. what might have caused it?...See MoreEmelie Paul
3 years agoEmelie Paul
3 years agoChloé
3 years ago
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