Miscellaneous Sick Plant Troubles This picture is caused by temprature changing from cold to warm, cold nights and warm days.
Some varieties, like equatorial sativas, don't take well to cold weather. If you can keep the roots warmer, the plant will be able to take cooler temps than it otherwise could.
This picture is what light bleaching/ light burn looks like.
Only way to fix this is to Move the lights away from the plant!
Or make sure you dont go over 75 watts a sq foot, or your plant will have to much light and light bleaching can occur anywhere on the plant. (indica species seem to bleach easier than sativas imo.)
(Picture Provided by Boy Howdy)
These pictures is what heat stress looks like.
Only way to fix this is to Move the lights away from the plant!
And get better ventalation, and or add more fans! Heat - If the lights are too close to the plant, the tops may be curled,
dry, and look burnt, mimicking a
nutrient problem. Your hand should not feel hot after a minute when you hold it at the top of the plants.
(Picture 1 and 2 Provided by Mosfed)
This is the most common and loved nuteburn :teef:
Ahh, nute burn! Stop this by not adding to much chemical/organic nutrients to your water,foliar feeding. DONT feed more than 1 time a week, use 1/4 strength for first feeding and then go up to 1/2 strength from then on when using chemical nutrients. Its very easy to overdo it. Causes leaf tips to appear yellow or burnt. To correct soil should be flushed with three gallons of water per one gallon of soil. NEVER give nutrients to plants that are under 2 weeks of age, at this age the soil nutrients are enough to suppliment them untill 2 weeks of age or more depending on how good your soil is. Using ferts before 2 weeks will almost likley kill your plants.
Stem Problems
Stem Breakage - Everyone from time to time has had this problem or will. This is when your stem is broken. Stem breaks can come from a number of things: training, dropping something on it, animals, weather. No matter how it happened the most important thing is to not panic.
Solution - Fixing this is not really a problem. Splint it with something and tape it in place. Marijuana has a great ability to come back even after a stem break. Give her a week or so to recover before she will start to grow again. And be more careful next time!
Misc things to know!!
When your humidity is low your leaves can become shriveled. Using humidity around 40-60% is fine for vegging and flowering.
If your plants are stretching than it can be caused by a few things. Not enough light, Light not close enough, or it’s the wrong kind of light. Stay away from incadesant bulbs they produce more heat than good. Same goes for halogens, they are worthless and cause more heat than anything else. Instead get a HPS, MH, Fluros or some compact fluros!
Hps will keep your plant short and stubby while cool fluros will keep your plant bushy, while soft white will keep your plant tall,Having a mixture will have a tal and bushy plant! Nothing wrong with having mixed spectrums!
Or just go grow outside and save energy!!
When unrooted clones start to yellow it means they are either not touching the rooting medium good enough, to much co2, or the light is to far away. Plain tap water that is ph adjusted is just fine till the clones have rooted. Giving any ferts will kill them untill they have been rooted.
PPM = parts per million
EC = electric conductivaty
TDS = total desolved solids
(information provided by syko2)
If you are running in hydro its good to change your water every 2 weeks to keep out bacteria growth and to keep your plants with a good supply of fresh water.
A good rule to go by for how much PPM each part of your plants growth has is as follows:
Seedlings should be around 50-150 PPM
Unrooted clones to be around 100-350 PPM
small plants to be around 400-800 PPM
large plants to be around 900-1800 PPM
Last week of flowering use plain water.
If you see dark or patchy spots on your leaves, that could mean you have mold. Check fordark patchy areas on the leaves and if you do have mold, lower the humidity and get a better ventilation setup going to prevent further occurrences.
And most important.. KEEP YOUR GARDEN CLEAN!!!
I hope you have enjoyed this guide and hopefully it has helped you out or someone else has been helped by it.
Stay Safe and God bless!