Calcium deficiency can be provoked by Magnesium excess, even when there is plenty of Ca around, you need to check out this possibility. You are using the percents on the label which makes perfect sense to a logical person, but industry enjoys exaggerating and confusing, or something like that. The N-P-K numbers are only for elements in the first case of N. P is "expressed as P2O5" and K as "K20" which inflates the phosphorus and potassium by adding some hypothetical oxygen that actually isn't in your hydroponic fertilizer. Don't ask why. No sense on reinventing the wheel, here's what Wikipedia has to say about this: The factors for converting from P2O5 and K2O values to their respective P and K elemental values are as follows: P2O5 consists of 56.4% oxygen and 43.6% elemental phosphorus. The percentage (mass fraction) of elemental phosphorus is 43.6% so elemental P = 0.436 x P2O5 K2O consists of 17% oxygen and 83% elemental potassium. The percentage (mass fraction) of elemental potassium is 83% so elemental K = 0.83 x K2O Nitrogen values represent actual nitrogen content so these numbers do not need to be converted. To convert 2.73% nitrogen to express as ppm when dissolved in water, just specify how much 2.73% fertilizer is in how much water. For 300 *grams* in 17 gallons, the ppms are estimated for the working solution by the weight of nitrogen/ weight of water. A gallon is 3785 grams. In this case 8.19g/64,345g = 0.0001273 To convert fractional part to parts per milliom (ppm) instead of percent, multiply by 1,000,000 instead of 100. That comes out to 127 ppm for N. P and K need to be adjusted by the factors mentioned to get the pure element and then calculated the same way. That's all I did. The absolute percentages in the fertilizer as you have them are not as relevant as their ratio to each other since a more concentrated fertilizer uses less weight of fertilizer to get to the same point. I do suspect that you have a nutrient problem though and my thinking base on the limited info is that there may be too much magnesium in there locking out potassium. That I got from the generalitities you've mentioned. However the symptoms as discussed sound more like nitrogen deficiency and there are no more limbs to go out on without real quantitative info and this will all make sense as you get into it more. For example, if the plants with more light are growing faster, they may have a greater nutrient demand and the plant may do what yours are doing by sapping nutrients from old growth to support and favor younger growth and reproductive tissue (tomatoes!). The last picture seems to be far more pronounced and not limited to the older growth though, not sure, the tones seem to be saturated in yellow (maybe on another monitor is shows up better but I have a cheapo monitor that freaks washing out with saturating colors) making it harder...

same problem here...in Maryland. 3' plants in raised beds. noticed some wilting on one plant a couple of weeks ago, it's gotten worse and is only at the top...and just beginning to notice it on another nearby. seems to get worse in the later afternoon. We raised most of these from seed...San Marzano type. i did use Llama dung to augment the soil, but did that last year also. I used 1-2 sheets of newspaper as a weed barrier with an inch or two of straw over that. I had great luck last year with nearly the same method, but used grass clippings over the newspaper. I water as needed, when we have no rain. No walnut trees...they get sun from about 930a-5p. any thoughts????? Help!!!

On the recent Indigo Rose thread, Carolyn mentioned "cupped leaves" (her April 9 post, about halfway down): http://forums.gardenweb.com/forums/load/tomato/msg0322301318384.html?15 That's all I know.

So I've been growing some beefsteak (I think) tomato plants indoors, mainly for fun, but I do want them to do well. They've seemed to develop some leaf curl, and those leaves have gotten kinda bumpy, like they're crinkling up almost, along with yellow-ish spots? Sorta along the veins on the leaf. The newest growth they have seems to be unaffected, but I don't know if it'll stay that way. I've tried researching what this is but nothing I've seen looks exactly like this? Not sure. If anyone could help me out that'd be very nice! - If it helps, they're under a LED growlight in a windowsill that doesn't get much direct sunlight. I just transplanted them into bigger containers (solo cups with holes in the bottom lol. Couldn't find actual pots to buy, but these are temp.) I put them in a mix of Miracle-Gro potting mix & ecoscraps natural + organic potting mix. Thier two first true leaves were getting a bit yellow before I moved them, but I chocked that up to me not being able to transplant them fast enough, I had grown them in cut up egg carton and they got much too big for it and I couldn't move them right away. They seemed to grow fine after that though, and they're still growing. Also I didn't take them out of the egg carton because they had grown into the bottom of it a bit, so I just cut off what I could without touching the roots and stuck them in there with it.