Sizla 151 Posted November 17, 2013 Share Posted November 17, 2013 sweet mango auto the plant was great , till ~ middle of its floweritn then it started to get necrotic spots , it happened fast ( 1 max 2 nights ) I cutted off fertilizes and am watering with water only dor now on but it looks like theres more of spots with every day ... -Symptoms of the problem:nectotic spots as seen at pics-Age of the plant:half of the flowering / do not count days this time - sorry-Medium used (soil/coco/hydro if hydro what type):soil/coco mix-Size of the pots:5,7 l-Temperature Day/night:26/22 *c-Humidity levels:60%-Type of feeding (brand etc..):powerfeeding hybrids , peters proffesional blosom booster (NPK 10:30:20 )-Watering frequency (quantity and how often): sometimes daily sometims less often , if daily its 0,5 L if i do few days of then i water its more :1- 1,5 L -Last EC's used:dont know , I used 4 grams of powerfiding hybrids and 2 grams of peters BB for 5 liters -PH: it must be betwerrn 4,9 and 6,9-Light Power: 120 w-Type of light (LED, HPS, CFL...): cfl-Distance from the plant: 5 cm + plexi glass-Size of the room: 0,2m2-Ventilation system: in: 8cm PC vent + passiv / out 12cm pc vent Quote Link to comment Share on other sites More sharing options...
Sizla 151 Posted November 17, 2013 Author Share Posted November 17, 2013 Quote Link to comment Share on other sites More sharing options...
zub0 249 Posted November 17, 2013 Share Posted November 17, 2013 looks like potassium deficiency Quote Link to comment Share on other sites More sharing options...
Sizla 151 Posted November 17, 2013 Author Share Posted November 17, 2013 I went for calcium after Dust's advise made a water solution with ~10-15 eggshells which i pulverized 1st. - will see how it reacts Quote Link to comment Share on other sites More sharing options...
gonzosghost 1,933 Posted November 17, 2013 Share Posted November 17, 2013 I would have thought the same as Dust then, a cal/mag problem maybe, as I have had this happen to me Quote Link to comment Share on other sites More sharing options...
Herb Johnson 22 Posted November 17, 2013 Share Posted November 17, 2013 I had a very similar thing in my last grow. Calcium deficency that was fixed very easy with a few doses of trace elements. Some times calcium deficency symptoms appear from not watering enough, in this case its not calcium you need, its a more consistent watering program.Did I read your post correctly?You grow in 5-7 litre pots?You water them with .5-1.5 litres at a time?And you use a coco+ soil mix?If that is the case, imo you are not flushing the excess nutrients out and replacing them with fresh well balenced nuts.You need at least 10% run off to help wash away unused nuts, or you will end up with a excess of chemicals (eg if you plant is in flower it is not using nitrogen as much as it want p & k,so your nitrogen levels will continue to climb and they can get to toxic levels, and also effect the absorption of other chems (mostly trace elements)like calcium)All the best and I hope you get on top of it. Quote Link to comment Share on other sites More sharing options...
Sizla 151 Posted November 18, 2013 Author Share Posted November 18, 2013 Yes YOu had it correct , th eplant is in 5.7 L Pot , coco soil mix and i water it most of the time with 0.5L , sometimes if i give it a few days rest from watering they get bog one with 1.0 - 1.5 L yeh i did not flush it at all , I know I should but the plant was doing tjust great .... as for nitrogen at flowering - the same I was thinking looking at Power feeding proportions - but loooks like they are working , VARY low P and high N for the full extens of grow ... Quote Link to comment Share on other sites More sharing options...
Sizla 151 Posted November 18, 2013 Author Share Posted November 18, 2013 i flushed it - just in case , it wont harm her as its her 1st 1 Quote Link to comment Share on other sites More sharing options...
el.sapo 7 Posted December 1, 2013 Share Posted December 1, 2013 Also get an exact idea of what your pH is. If you are powder feeding it is most likely correct and stable but depending on your water source, your pH could be fluctuating. Keeping a steady pH is as important as having your pH in the correct range. All of these guys are correct in their advice, I just wanted to add that because it sounded like you might not be monitoring pH. Using a lot of pH Up and pH Down products in soil isn't a good idea, but if you absolutely need to raise, silicate additives(water soluble silicon) raise it dramatically. It is a micronutrient that plants use to strengthten and thicken cell walls anyway and is OK to use in soil. If you absolutely need to LOWER pH, you might have a hard water situation and want to invest in a nice 3 stage filter(reverse osmosis, UV, carbon). 1 Quote Link to comment Share on other sites More sharing options...
Undutched 729 Posted December 5, 2013 Share Posted December 5, 2013 this a cal/mg issue probs due to soil ph. Quote Link to comment Share on other sites More sharing options...
