Trying again on the images

Hello NurseChristina, You list your zone as 5, but where are you located? Knowing that would help us give you better advice. Do your tomato plants have blossoms or fruit on them? I assume since you mentioned SFG (square foot gardening) that you are planting in a raised bed. Did you move them into another raised bed, directly into the ground or into containers? As long as they are not in containers, I would suggest side dressing them with the TomatoTone. I suggest it because the nitrogen is lower, you want support for fruits and roots, not foliage growth. NPK = up, down, all around. Just follow the TT's recommended amounts in a circular furrow about 6" from the stem. Keep the fert off the leaves and roots so they don't get burned. You can follow up with another feeding in 3-4 weeks. If they are in the ground (or raised bed) I'll contradict Seysonn's watering advice . . . . Neither of us knows where you are or if you are container gardening, so we may both be wrong. However, I'd recommend deep watering if they are in a raised bed or in the ground, I don't think you'll get the deep watering with a watering can. And if you are side dressing, you don't need to feed every watering. If they are in containers, then Seysonn's directions are right on. I hope that helps. Betsy

Like many said, looks like a variation of exposure. Looks like a petiole with some leaflets too close to a light bulb and damaged indoors, just to be taken outdoors and face the elements and cause that. Whatever mold is probably there is just an afterthought and fairly benign growing on the necrosis caused by that harshness. Maybe this longest leaf got a double whammy by growing further away from the bulb after the hot exposure, and then developed poorly without receiving necessary light intensity after its intense time close to the bulb. With hydroponic nutrients it is easier to create the conditions for some fertilizer burn, too, in such compromised leaves, adding more gasoline to the fire... I would leave it all, mind the humidity and avoid leaf wetness, and watch if the leaves naturally dried out on their own till my plant had more leaf area. Then, possibly cleanly remove the tip or all of that 'branch' before it may abscise, though if it proceeds naturally by drying out I'd rather leave it to its own. PC

The plant isn't getting near the light it needs to stay fit. In a very high % of plants, a reduction in photo load (light levels or duration of exposure) stimulates chemical messengers to inform plant central which leaves are not pulling their weight (they are using more energy than they are producing). The plant then starts the shedding process, which initially includes harvesting mobile nutrients and other bio compounds from leaf tissues. Since magnesium (Mg) is mobile, the plant salvages it and recycles it from leaves destined to be shed. Mg is an important part of the green pigment chlorophyll because it's at the center of every molecule, so when Mg is salvaged, chlorophyll molecules are destroyed. With the primary pigment no longer expressing, other pigments that are present but masked by chlorophyll become visible. That's what you're seeing in the leaves. The necrotic areas on the leaf margins are almost certainly the result of over-watering, or a soil that's too water-retentive for how you currently water. That needs to be addressed, or you need to be resigned to the fact that a very significant measure of the plants potential will be lost as it spends energy regenerating roots killed by the prolonged periods of soil saturation. I suggest you start using a 'tell' to 'tell' you when it's time to water. Your digital device (finger) works poorly as a guide in pots deeper than a few inches. More on using a tell at the bottom of my offering. Background/more details: - I am using Formula 420 soil (recommended by the nursery). Many media that are recommended by the seller are no where near what the plant needs to maintain a healthy root system. It's good to keep in m ind that a healthy plant is only a dream if you can't keep the root system happy. A picture of it on a piece of white paper would offer a clue about where the soil belongs comparatively (poor, fair, middling, good, better, ..... - Plants are potted in a glazed terracotta pot with a single large drainage hole in the bottom. Did you move it to that pot when you bought it, or soon after? If so, it might be over-potted. - The bottom 1-2 inches of the pot are rocks/pebbles (I don't know where this came from or why I did it) Not helpful as a drainage layer, but there are ways to use large items big rocks, bricks, soda bottles, over-turned pots, ...... as ballast - with very good results. - When potting the plant from its original container, it was nearly impossible for me to loosen the roots up much at all - the whole potted area (soil/roots) was very dense and I was afraid to break it up too much in case I destroyed the roots (not large thick roots, very fine thing roots spidering EVERYWHERE). If you live in the US and not in the deep south, Somewhere around Father's Day is the best time to repot. Plants that live indoors are generally at their weakest from mid-winter through early spring, so repotting during that period, except for emergencies, is best avoided until the timing better favors a fast recovery - June. - Deep watering is taking place once a week - or when the top 3-4 inches is dry - and the excess water in the drip pan is removed (somewhat) promptly - this is *not* a scientific method whatsoever, I'm getting a dowel to insert into the soil in about 30 mins. OK - good! I covered that a bit above, and already added the info about using a tell below, so I'll just leave it in case others passing through have interest. Try to make sure there is no pathway by which the effluent can make its way back into the pot once it's exited through the drain hole. The pot should never sit in the effluent. I raise all of my pots so the bottom of the pot is ALWAYS above the maximum level the effluent can reach. Example: - Once a week (or depending on dust) I wipe each leaf down with a damp towel. That's fine if you're using just water. Avoid using any household cleaning supplies, and rinse residual soap or fabric softener from the cloth before you use it. - I used to mist the leaves the first couple weeks once every day or so - but I can't believe this is effective AT ALL and stopped this practice. Good - you were right. - Overall growth on each of the plants has stopped - in fact, the plant showing issues has been the fastest grower of the 3. As mentioned earlier, I used to get about 1 new leaf per plant every week until the last week. Each plant has a visible meristem, the two on the non-affected plants are very short and haven't grown in days, the one on the affected plant has been about to open for the last few days but hasn't. Plants that aren't growing are dying. I didn't coin that sentence, a guy with a PhD did in one of his books about plant production in containers. His name is Carl Whitcomb. He reasons plants that make more food/energy than it takes to keep their systems orderly create new cells with the bounty - IOW, they grow. Plants that use more energy than they are making, don't grow. In fact, as shedding organisms, they start shedding biomass, starting with leaves, then branches. Since using more energy than the plant can create is an unsustainable arrangement, if a plant is not growing, it will die unless the trend is reversed. You reverse the trend by correcting conditions that require the plant to live at, near, or beyond the limits it's genetically programmed to tolerate. That's your ONLY job as a grower - to figure out what's wrong and fix it. Learn to do that and you can grow almost anything in a pot. - On the lower part of 2 of the plants, where the leaves attach to the trunk/stem, seems to be drooping - I'm unsure if this is a symptom or the leaves are just somewhat heavy. You described what happens when plants lose turgidity (internal water pressure) - they wilt. The wilting occurs from over-watering because root function is suppressed by a lack of oxygen in the medium when the soil's pores are full of water. That's also why you're seeing necrotic lesions on leaf margins. Over-watering affects water uptake and prevents the plant fro9m effectively moving water to its most distal tissues - leaf tips/margins. - There has been zero fertilization; brand new soil and only a month of time in my home seemed a little soon for the need to fertilize (to me, the dummy). You should probably be thinking about fertilizing. It's imperative if you want healthy plants in pots. I use Foliage-Pro 9-3-6 on ALL my trees (275 - 300 of them, not counting cuttings. If you're interested, ask somewhere down the line. It's monkey easy if your soil allows you to water correctly, and very difficult to do effectively if you are forced to suffer under the influence of a water-retentive medium. Basically - I believe I've been overwatering this buddy of mine - BUT, I'd be devastated if I corrected the watering but still had the same issues. Does this look like classic - and ONLY - overwatering, or is there anything else I should attempt to correct/rule out? Growing well is a holistic discipline. You must provide everything the plant needs, and not too much of it if the plant is to prosper. This is surprisingly easy to do, once you understand how to recognize of make a soil that you won't have to war with for control of your plant's vitality (health). Everything is in play. Light, temperature, fertility, soil structure, (soil) moisture control, others. It's likely that too much water in the soil is currently limiting the plant; but, correcting that just makes something else the most limiting. Like driving to a distant destination. You're lost, low on gas, and have a leaky tire. Getting unlost and back on track makes being low on gas or the leaky tire the threat most likely to keep you from your destination. Plants work exactly like that. Fix the over-watering and light is probably the factor that's limiting. Fix the light issue, and temperature or nutrition, or soil pH will be next on the list of most limiting. We're always trying to fix what causes stress, and there's always something causing it. Fortunately, you can quite easily reach the level where you're entirely happy with your plants health and appearance, but that requires avoiding a helter skelter approach and sticking to a reasoned plan you can replicate at will. You'll also find that plants are very similar in what they like. They are for more different in what they won't/can't tolerate. IOW, a very high % of plants, with the right medium, can all be treated the same and thrive for it. Al 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.