coldshot60
Active Member
Hey im having some problems with my leaves. Could any one look at my picture and tell me whats wrong with my plants!!
help with plant leaves (with picture)
- Thread starter coldshot60
- Start date
mogie
Well-Known Member
Contributed by: Nietzsche
PLANT ABUSE
Heat Stress :
Look closely below, and you'll see the brown leaf edges that are indicative of heat stress. This damage looks alot like nutrient burn, except it occurs only at the tops of the plants closest to the lamps. There's only one cure for this...get the heat away from the plants, either by moving the lamps or moving the plants.
Figure 1
Nutrient Solution Burn:
There's a good chance that this leaf was subjected to nutrient solution burn. These symptoms are seen when the EC concentration of hydroponic solutions is too high. These symptoms also appear when strong nutrient solution is splashed onto the leaves under hot HID lamps, causing the leaves to burn under the solution.
Figure 2
Many hydroponic gardeners see this problem. It's the beginning of nutrient burn. It indicates that the plants have all the nutrients they can possibly use, and there's a slight excess. Back off the concentration of the nutrient solution just a touch, and the problem should disappear. Note that if the plants never get any worse than this leaf (figure 3), then the plants are probably just fine. Figure 4 is definitely an over-fert problem. The high level of nutrients accumulates in the leaves and causes them to dry out and burn up as shown here. You must flush with clear, clean water immediately to allow the roots to recover, and prevent further damage. Now find the cause of the high nutrient levels.
Figure 3 (left) and Figure 4 (right)
Over Watering:
The plants in figure 5 were on a continous drip system, where nutrient solution is constantly being pumped into the medium. This tends to keep the entire root system completely saturated. A better way would be to periodically feed the plants, say for 1/2 hour every 2-3 hours. This would give the roots a chance to get needed air to them, and prevent root rot and other problems.
Don't be throw off by the fact that the plants in figure 5 are sitting in still water, this is actually an H2O2 solution used to try and correct the problem. Adding an airstone to the tub would also help add O2 to the solution.
Figure 5
pH Fluctuation:
Both of these leaves in figure 6 and figure 7 are from the same plant. It could be over fertilization, but more likely it is due to the pH being off. Too high or too low a pH can lock up nutrients in the form of undisolvable salts and compounds, some of which are actually toxic to the plants. What then happens is the grower then tries to supplement the plants diet by adding more fertilizers, throwing off the pH even more and locking up even more nutrients. This type of problem is seen more often in soil mixes, where inconsistent mixing of the medium's components leads to "hot" spots.
Figure 6 (left) and Figure 7 (right)
Ozone Damage:
Ozone damage typically found near the generator. Although a rare problem, symptoms generally appear as a Mg deficiency, but the symptoms are localized to immediately around the generator.
PLANT ABUSE
Heat Stress :
Look closely below, and you'll see the brown leaf edges that are indicative of heat stress. This damage looks alot like nutrient burn, except it occurs only at the tops of the plants closest to the lamps. There's only one cure for this...get the heat away from the plants, either by moving the lamps or moving the plants.
Figure 1
Nutrient Solution Burn:
There's a good chance that this leaf was subjected to nutrient solution burn. These symptoms are seen when the EC concentration of hydroponic solutions is too high. These symptoms also appear when strong nutrient solution is splashed onto the leaves under hot HID lamps, causing the leaves to burn under the solution.
Figure 2
Many hydroponic gardeners see this problem. It's the beginning of nutrient burn. It indicates that the plants have all the nutrients they can possibly use, and there's a slight excess. Back off the concentration of the nutrient solution just a touch, and the problem should disappear. Note that if the plants never get any worse than this leaf (figure 3), then the plants are probably just fine. Figure 4 is definitely an over-fert problem. The high level of nutrients accumulates in the leaves and causes them to dry out and burn up as shown here. You must flush with clear, clean water immediately to allow the roots to recover, and prevent further damage. Now find the cause of the high nutrient levels.
Figure 3 (left) and Figure 4 (right)
Over Watering:
The plants in figure 5 were on a continous drip system, where nutrient solution is constantly being pumped into the medium. This tends to keep the entire root system completely saturated. A better way would be to periodically feed the plants, say for 1/2 hour every 2-3 hours. This would give the roots a chance to get needed air to them, and prevent root rot and other problems.
Don't be throw off by the fact that the plants in figure 5 are sitting in still water, this is actually an H2O2 solution used to try and correct the problem. Adding an airstone to the tub would also help add O2 to the solution.
Figure 5
pH Fluctuation:
Both of these leaves in figure 6 and figure 7 are from the same plant. It could be over fertilization, but more likely it is due to the pH being off. Too high or too low a pH can lock up nutrients in the form of undisolvable salts and compounds, some of which are actually toxic to the plants. What then happens is the grower then tries to supplement the plants diet by adding more fertilizers, throwing off the pH even more and locking up even more nutrients. This type of problem is seen more often in soil mixes, where inconsistent mixing of the medium's components leads to "hot" spots.
Figure 6 (left) and Figure 7 (right)
Ozone Damage:
Ozone damage typically found near the generator. Although a rare problem, symptoms generally appear as a Mg deficiency, but the symptoms are localized to immediately around the generator.
coldshot60
Active Member
k.. what do you think it is??
coldshot60
Active Member
my water is 6.6-6.8 the temp of my grow room is 75-77. i use a 400W hps. and its about a foot away from the light
hondaturbo
Active Member
how old is your plant and what kinda nutes do you use?
coldshot60
Active Member
its about a month and a half old and the nutes i use is 20-20-20
Looks and sounds to me like your PH is too high. Keep your PH around 5.5, or follow the suggestion of the manufacturer of the nutes you are using. High PH will prevent your plants from being able to take up certain nutes, and overdose on others, and shows itself as nute burn...and that's what the picture you provided looks like. If this were heat stress, the damage would be on leaves that are closer to the light.
coldshot60
Active Member
yes my grow room has lots of ventilation
should i check the ph of my water as it drains from the bottom of the pot?
and what do i do if the ph is off?
should i check the ph of my water as it drains from the bottom of the pot?
and what do i do if the ph is off?
coldshot60
Active Member
k i think its my PH because my PH is 6.9 and after it goes through the soil it is 6.5 - how do i fix my ph can i buy PH down at a gardening store? also can i use PH down that u buy at a aquarium store that u use to change the ph of your fish tank???
FilthyFletch
Mr I Can Do That For Half
Ok so I assume Im right in saying your growing in soil?If so you are checking the soil ph and the water ph correct? Dirt will need a soil ph test kit to see whats going on in the soil.
coldshot60
Active Member
im just using a water PH tester to test the water from the tap and the water the drains from the bottom of the pot
My nute solution gets the PH to the correct level, but the PH doesn't always stay optimal. The PH adjust you get at the fish shop will work just fine, but so does vinegar and lemon juice...vinegar is the cheapest, but it doesn't smell so great. You should check the PH before you water, and check the water that ends up in the catch pan. I don't have any links, but was very unhappy to find soil PH testers were extremely cheap compared to the water PH testers, so order one already. In the mean time find the right mix of nutes and acid to produce catch pan water that is around 5.5
videoman40
Well-Known Member
Dude, I keep reading your posts where you are telling him to get his ph around 5.5, if it were my plants, I'd be shooting for 6 to 6.5 in soil.
Peace
PS, if you want a reliable instrument to test ph, get a Milwaukee Instruments pen, or a Hanna pen, they are cheap, and they work.
Peace
PS, if you want a reliable instrument to test ph, get a Milwaukee Instruments pen, or a Hanna pen, they are cheap, and they work.
Spittn4cash
Well-Known Member
whats that saying "when in doubt, flush it out" or some shyt?...I know they say "when in rome, do do as the romans do"
but yea, U were probably feeding it too much nutes bcuz it looks like nute burn...most of us n00bs think its a deficiency, so we add more nutes to offset it, the chemicals built up in the soil and probably has caused some root rot, nute lockout, salt build up, making your soil super toxic and what appears to be a deficiency...
U need to flush the soil, cut off them nasty lookin leaves and keep it movin..
make sure it dont happen again by under-feeding as opposed to over feeding..
but yea, U were probably feeding it too much nutes bcuz it looks like nute burn...most of us n00bs think its a deficiency, so we add more nutes to offset it, the chemicals built up in the soil and probably has caused some root rot, nute lockout, salt build up, making your soil super toxic and what appears to be a deficiency...
U need to flush the soil, cut off them nasty lookin leaves and keep it movin..
make sure it dont happen again by under-feeding as opposed to over feeding..
Widow Maker
Well-Known Member
I would flush real good. Looks like a nute burn to me.