In the beginning of June, I planted 4 super silver haze fem seeds each in its own outdoor container after germinating in cotton. 2 never sprouted, 1 died after 2 days above soil. The last one was doing great until it started showing white on the upper leaves and now the new growth is feeble at best. see photos attached. thank you in advance of your advice.
We could use more info. What are the parameters in your grow?
Let’s get you started with a ILGM support ticket that my buddy, Latewood, had first developed for our ILGM support forum. 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, 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(unknown bag seed, strain name, 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 %? Day vs. night
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/or facts will help us help you 
~MacG
My first instinct when I see leaves like this is almost always to question the pH. The pH of the water you give it as well as the pH building up in the root zone of the plant. Spots and crispy burning edges are often from a pH induced nutrient lockout or toxicity.
However too much nutrients building up in the soil, or too many minerals from hard tap water, can also cause this type of look to the leaves, and so a nutrient concentration reading in the soil,and or in what you feed it would also help, with a meter, a total dissolved solids or electrical conductivity measurement would be most helpful.
Also sometimes too much light, or a sensitivity to a lot of light because of something that was applied to the leaves, and/or heat can cause some burn like spots on the leaves as well. As well as some critters, sometimes, and so the more info would be helpful.
But my first guesses are the pH and a possible nutrient and/or mineral salt build up in the soil.
Hey I have a question. I was wondering if anyone might know what this is Can any help me this is recent. And now my other plant’s or beginning to get the same thing.
My dog ATE my plant! Yes he was sick for a couple days. So, I planted my last 4 seeds Aug 1st. I have 2 plants from them, one sprouted a week after the first. They are flowering. I’m just waiting for red/brown on the buds to harvest. Since they are feminized seeds, I just trim the leaves, dry the stalks by hanging them upside down, right? And I can smoke the leaves too? Or is there another way to enjoy every bit I can. Thx!