A question from a fellow grower:
I was wondering if you could please give me some advice on my plants .I
don’t know what is wrong with the middle plant it started wilting like
2weeks back. Thought it was due to over watering so i reduced watering
for 4days then flushed it. Now brown edges on leaves slightly. Other
plants are fine and healthy. Is it soil bacteria?
The things I would be leaning towards would be nutrient salt build up or a pH imbalance that has built up in the root zone, however…
We could use more info. What are the parameters in your grow?
Let’s get you started with a ILGM support ticket that Latewood had first developed. It’s is a great checklist of things in your plant’s environment that might help give us an idea of what could be going wrong.
Answer all the relevant questions the best you can and we might be able to get an idea of what is going on.
If you do not know, or do not use something, just say so or put ‘NA’.
ILGM Support Ticket:
What is the strain and type(strain name, unknown bag seed, regular seeds, feminized seeds, auto-flower, etc)?
Indoor or Outdoor? If outdoor, planted in ground or in a container?
Size of space (max height and area, length/width)?
Soil or Hydro? Type of Medium used? System type?
pH? Of the soil or medium (root zone/reservoir/runoff) and of the water and/or nutrient mix that is fed to the plant?
Type and strength of nutrients used? NPK? EC/TDS/PPM levels?
Temperature? Day vs. night temp or highest and lowest temps? Root zone temps?
Humidity %?
Light system/watts/lumens/FLUX/PAR?
Ventilation system? Size? CFM? CO2? AC, Humidifier, De-humidifier?
Number “weeks/days” from into Season, Vegetative Growth or Bloom/flowering?
Add anything else you feel would help us give you a most informed answer. Feel free to elaborate, but try to be brief and to the point. Short and to the point questions and facts will help us help you 
i was also thinking a type of root balance weather it be a ph problem or a root disease. another reason i thought would be a Calcium deficiency??? would this be the symptoms.
it is a blue cheese strain indoor plant. feminized seeds. grew indoor from the beginning. started wiliting 2 weeks into flowering stage. for those first 2 weeks we used vegetative lights which is wrong i know but we only got the flowering lights 2 weeks later.
size: 1mx60cmx2m
soil with worm compost and coco peat
ph: NA
Nutrients: veg stage= 19:8:16
Flowering=3:1;6
temp=NA
Humidity=na
lights=CFL warm spectrum (4x 18w and 4 x23 w with 2x 85w cool spectrum)
Season= 3rd week of flowering (10hours on and 14 hours off)
the leaves are getting brown spots with brown edges and curling and wilting now. the bud formation looks 2 weeks behind the other plants.
pH can contribute to various nutrient lockouts(deficiencies) or toxicities(overdose), including calcium.
The difference between using a warm or redder/yellower light during flower is really not that important with CFL lights. The cool 6500K bluer lights are very close to the color of natural sunlight and contain a nice balance of all the spectra a plant needs for veg or flower. It isn’t even that important with HPS, as HPS has plenty of blue light in it even for vegging a plant. For the most part people make way too much about using different lights, after all there is really only one sun and it is about 5500K-6500K no matter what time of the year it is, yes winter has a little more red in the light, but it still would be rated at a 5500K color rating and no redder.
We could really know the pH and the temps and humidity, they all could be contributing to the leaf wilting, but the spots starting to show on the leaves really makes me think it is most likely a pH related nutrient problem.
Knowing the nutrient build up in the soil would help as well, that would be the EC/TDS/PPM reading, also sometimes called soil fertility on some soil probes. But they all measure the electrical conductivity of the nutrient salts, and then some give you a conversion reading of total dissolved solids in parts per million with a lot of the digital EC/TDS pens.
