Rusty patches
- Thread starter steff44
- Start date
DirtyMcCurdy
Well-Known Member
Looks more like calcium deficiency. But, as mentioned before, calmag would probably do the trick.
USbeginnerguy
Active Member
I believe you have a Boron Deficiency basically your PH is off and if it is your plant cannot take up nutrients. Which nutrients it cant take up depends on which end of the PH you are off. Do you have an electronic PH meter? If so when was the last time you calibrated it? If you dont have one get one asap.
Problem: Cannabis leaves and roots show abnormal and slowed growth when showing a boron defiency. The first signs of a cannabis boron deficiency is abnormal or thick growth tips. New leaves may display chlorosis (yellowing of leaves). Stems may become rough or hollow. The plant may look like it has a calcium deficiency because boron is needed for the plant to properly use calcium. New growth is affected the most, and may look like it's been burnt or scorched.
Solution: Boron is not absorbed will without enough potassium and nitrogen, or if there isn't enough moisture. You plant may also exhibit signs of a boron deficiency if the pH is too high or low. Flush your system with clean, pH'd water that contains about half the nutrients needed for the plant and watch to make sure that the problem clears up for new growth.
- See more at: http://www.thenug.com/galleries/diagnose-your-sick-marijuana-plants#sthash.1P4Vcan5.dpuf
Problem: Cannabis leaves and roots show abnormal and slowed growth when showing a boron defiency. The first signs of a cannabis boron deficiency is abnormal or thick growth tips. New leaves may display chlorosis (yellowing of leaves). Stems may become rough or hollow. The plant may look like it has a calcium deficiency because boron is needed for the plant to properly use calcium. New growth is affected the most, and may look like it's been burnt or scorched.
Solution: Boron is not absorbed will without enough potassium and nitrogen, or if there isn't enough moisture. You plant may also exhibit signs of a boron deficiency if the pH is too high or low. Flush your system with clean, pH'd water that contains about half the nutrients needed for the plant and watch to make sure that the problem clears up for new growth.
- See more at: http://www.thenug.com/galleries/diagnose-your-sick-marijuana-plants#sthash.1P4Vcan5.dpuf
Diabolical666
Well-Known Member
Thats a very progressed cal mag def. Give it some calmag (1 tbs, with reg feeding), pull the crap leaves off so you can see if it fixes.
Doc GreenThumbs
Member
That's exactly what you have going by the looks of it. When your pH is off it can stop other nutrients from entering the plants system. Give it a real good flush and then use calmag, pull crap leaves and baby her for a bit. It should pull through. Cannabis is a very tough plant
Cheers for replys guys..So its 1 of the 3 or all 3?? I read loads online & its saying the same regarding the 3 deficiencies. Epsom salts is 1 thing to try it says for magnesium deficency.. try eggshells crushed upninto powder & sprinkle on soil & water for calcium deficiency.Whe you say flush do I just flush with only water or flush with half nutrients??My pot is 7 litres would I flush that or 14 litres??I usually feed 1ml per litre of grow and bloom per week.If I flush 14 litres thru it would I add 7 grow and 7 bloom( that would be half of nutrient & grow)???Should I cut off infected leaves at middle& bottom as there's none near the top at present.1 thing more is when tried my 1st grow pH of water & soil was OK.I let the water sit for 24 hours then used it all was cool This time however I had filled a bigger pale & the water would be in it for 3 or 4 days instead of overnight, ( can that cause calcium deficiency?!).. Thanks again for all your valuable input
USbeginnerguy
Active Member
what is your ph at steff or are you saying you dont ph your water you just let it sit for 24 hrs? You should definitely 100% be ph'ing your water. Regardless of how long it sits. I would personally flush with verryy light nutes. I am only saying very light because most growers are using to much to begin with. I would like to know your ph or if you have even ph's the water at all.
I'm sure waters got pH of 6.5 or 7..I've never done a pH of run off water...Flush with half nutrients strength would be 0.5 ml per litre.. So how much water would I flush thru??Also can I flush it thrubif pot is heavy? As fed it & waters last night or do I wait till pot drys out??.I think I will cut them leaves off just now
USbeginnerguy
Active Member
I wouldnt cut the leaves just yet because i want them to take some more of the hit if you dont get the problem fixed. It will only eat up new leaves if you cut the bad ones. Youll have plenty of time to cut the leaves off dont rush it plus the leaves arent the problem they are only trying to tell you whats wrong. Flush it now. i personally would flush with clean PH'D WATER and i would want to know for sure what my PH is. Sounds like you might not know what the ph is idk i could be wrong. I put mine over my sink and flushed throughly with clean water 3 times over maybe an hours span until it was barely dripping out of the bottom of my pot then flushed again with very mild nutes. Then get her back under the lights and get those fans turned up!
USbeginnerguy
Active Member
yea that will be fine. I pour until i see a good amount coming out of the bottom of my pot
Doc GreenThumbs
Member
Soak it. When you flush it you want a lot of to come out the bottom. Then you have a good clean start. Wipe down your pots for any amount of calcium build up. You may have hard water is all. But calcium is like a nutrient blocker when built up. Stay positive, you got this.
