dolomite lime

Discussion in 'Newbie Central' started by High grade yute, Jun 17, 2009.

  1.  
    High grade yute

    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
  2.  
    growone

    growone Well-Known Member

    Best used when you're mixing your soil. Add at rate of 1 tbsp per gallon soil. Some recommend more per gallon. Very useful in controlling your ph.
  3.  
    itsgrowinglikeaweed

    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.
  4.  
    High grade yute

    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?
  5.  
    itsgrowinglikeaweed

    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?
  6.  
    High grade yute

    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.
  7.  
    itsgrowinglikeaweed

    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.
  8.  
    High grade yute

    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.
  9.  
    High grade yute

    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
  10.  
    itsgrowinglikeaweed

    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. :peace:
  11.  
    itsgrowinglikeaweed

    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.
  12.  
    High grade yute

    High grade yute Member

    if i decide to use the epsom salt how much should i use? I hav a 70L rez.
  13.  
    itsgrowinglikeaweed

    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.
  14.  
    High grade yute

    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
  15.  
    itsgrowinglikeaweed

    itsgrowinglikeaweed Well-Known Member

    Its all good man. Happy growing.:leaf::peace:

Share This Page