High grade yute
Member
hey...can anybody give me sum info on dolomite lime. like when its better to use(veg or flowering or both) and what I should look out for when using it.
Thanx
Thanx
dolomite lime
- Thread starter High grade yute
- Start date
itsgrowinglikeaweed
Well-Known Member
Yeah you only want to use it once. In your soil mix beforehand. You can put some on the surface and water it in but that would be like an emergency situation. If you want to know the chemistry its here > http://www.ncw.wsu.edu/treefruit/soil/lime.htm
The only thing to look out for is using too much. That will raise your PH to 7 and keep it there. A little goes a looong way.
The only thing to look out for is using too much. That will raise your PH to 7 and keep it there. A little goes a looong way.
High grade yute
Member
Sorry guys i didnt specify that i was doing hydro. I was reading that foliar feeding with dolomite lime would help with Ca def which I believe my babies hav. If so how often should I foliar feed. I added calcium nitrate to my rez yesterday, will this do the trick?
itsgrowinglikeaweed
Well-Known Member
DO NOT foliar feed with lime. For a calcium def use calmag or epsom salt. Calcium nitrate is a nitrogen fertilizer. I'm not sure if your plant can extract calcium from calcium nitrate or not. Give it a few days and we'll all find out.
Why do you think you have a calcium def?
Why do you think you have a calcium def?
High grade yute
Member
yellowish/brown spots started showing up on some of the leaves a couple days ago. isnt epsom salt used for Mg def?
y wouldnt the plant b able to extract calcium from Calcium Nitrate, it has more Ca in that than N.
and y do you suggest that i not foliar spray with dolomite lime? ive seen it reccomended a couple times in this forum.
y wouldnt the plant b able to extract calcium from Calcium Nitrate, it has more Ca in that than N.
and y do you suggest that i not foliar spray with dolomite lime? ive seen it reccomended a couple times in this forum.
itsgrowinglikeaweed
Well-Known Member
Epsom salt is a magnesium AND calcium source. MJ is a cal. & mag. hungry plant. Many growers use epsom salt.
Calcium Nitrate-The fertilizer grade N-P-K (15.5-0-0)+ 19% Ca is popular in the greenhouse and hydroponics trades; it contains ammonium nitrate and water, as the "double salt" 5Ca(NO3)2.NH4NO3.10H2O. Formulations lacking ammonia are also known: Ca(NO3)2.4H2O (12.8-0-0 + 18.3%Ca). A liquid formulation (9-0-0 + 11% Ca) is also offered. An anhydrous, air-stable derivative is the urea complex Ca(NO3)2.4[OC(NH2)2], which has been sold as Cal-Urea.
So according to this your plant can take some calcium from calcuim nitrate but your also giving your plant a good dose of nitrogen along with it. There are better calcium sources. Calcium nitrate is meant to be a nitrogen fertilizer not a calcium source. If you have a calcim def use cal mag or epsom salt.
WHY do you want to spray lime on your leaves? If its for the calcium...again there are better ways to give calcium to your plant. Dolomite lime contains a lot more than just calcium. Spraying it on your leaves will likely do more harm than good. Post a link to where someone said to do this. From what i understand, dolomite lime is not even water soluable. You would have to use HYDRATED lime. But again i dont know WHY you would want or need to.
Calcium Nitrate-The fertilizer grade N-P-K (15.5-0-0)+ 19% Ca is popular in the greenhouse and hydroponics trades; it contains ammonium nitrate and water, as the "double salt" 5Ca(NO3)2.NH4NO3.10H2O. Formulations lacking ammonia are also known: Ca(NO3)2.4H2O (12.8-0-0 + 18.3%Ca). A liquid formulation (9-0-0 + 11% Ca) is also offered. An anhydrous, air-stable derivative is the urea complex Ca(NO3)2.4[OC(NH2)2], which has been sold as Cal-Urea.
So according to this your plant can take some calcium from calcuim nitrate but your also giving your plant a good dose of nitrogen along with it. There are better calcium sources. Calcium nitrate is meant to be a nitrogen fertilizer not a calcium source. If you have a calcim def use cal mag or epsom salt.
WHY do you want to spray lime on your leaves? If its for the calcium...again there are better ways to give calcium to your plant. Dolomite lime contains a lot more than just calcium. Spraying it on your leaves will likely do more harm than good. Post a link to where someone said to do this. From what i understand, dolomite lime is not even water soluable. You would have to use HYDRATED lime. But again i dont know WHY you would want or need to.
High grade yute
Member
Well my purpose for adding calcium nitrate initally was to giv my plants more N in this veg stage to go along with the dnf 2 part nutes that I hav (A 2-0-2, B 0-1-3). When I initally asked about it I figured it would also b helpfull in fixin my ca def.
High grade yute
Member
I cant seem to find the link where i saw it in this forum but here is a link to another forum where i saw it
http://www.icmag.com/ic/showthread.php?t=11688
If i cant get calmag, will calmax do?
Thanx alot for all of ur advice, i really appreciate it. bless
itsgrowinglikeaweed
Well-Known Member
Thats cool man. I dont do hydro, I'm a soil guy. You asked about lime. i know some things about lime. I'm not really down with inorganic compounds such as calcium nitrate. I don't think too many hydro growers use dolomite lime for anything. Soil growers use it mainly to keep PH in check. The addition of ammonium based fertilizers to soil will lower the ph of the soil. Lime is added to the soil before hand to keep the PH from dropping too low. Some magnesium and calcium is just an added bonus. Hydro guys have the PH up and down chemicals and dont need lime.
If the calcium nitrate does the job...great. If not, epsom salt will fix a calcium def in only a couple of days. Lime is not the answer for you. Happy growing.
itsgrowinglikeaweed
Well-Known Member
As a soil grower I am only vaguely familiar with calmag and cal max. I would have to look each of them up. I bet they're probably two differnt kinds of the same thing. I KNOW epsom salt will work. Even with the lime in my soil i still add some epsom salt a couple times during veg and flower for the extra cal. and mag.
High grade yute
Member
if i decide to use the epsom salt how much should i use? I hav a 70L rez.
itsgrowinglikeaweed
Well-Known Member
I use 1 teaspoon per gallon. But for hydro half or even 1/4 of that would be sufficient. A small plant wont need as much as a big plant
I found this regarding hydro >1/4 to 1/2 tsp/gal adds almost 40-80 ppm of Mg. Mel Frank states that Mg demands are constant at ~60ppm, regardless of growth phase.
That should give you a ball park. Just remember you can always add more but you can't take any back! And like i said you should see a difference in your plants rather quickly. Good luck.
High grade yute
Member
i got cal max 2day and added it at 1/2 strength to my rez...we will see how that goes..thanx for ur advice i appreciate it
itsgrowinglikeaweed
Well-Known Member
Its all good man. Happy growing.
Wow..I know it's an old thread..but so much misinformation here! Epsom salt a source of calcium? Where in the world does one get such bad info from and then spread it? Epsom salt is magnesium sulfate! no calcium whatsoever in there!
hybridcheef
Active Member
i know this is an old thread but iv seen this many times bfore as well. why the hell people thing epsom salts as calcium is beyond me. just shows that you should take what people sayon these forums with a grain of salt. dont just go out and do what someone says. most likely there wrong lol.
Rolla J
Well-Known Member
Like a game of spill the beans.. Epsom salts consists of magnesium sulfate brotha. Use is for that, not calcium. others use home items such as crushed egg shells for calcium