Dolomite Lime

Hi,
My Bubblegum has just started her 3rd week of flowering -





Starting to see a Magnesium deficiency and think it's due to a low PH after adding nutes, roughly 6.2.
I've used Epsom salts, but this contributes to lowering the PH, effectively locking the Magnesium out so I believe.

I thought I'd give Dolomite Lime a try and wondered -
a: Would this be any good off eBay - Dolomite lime
b: How would I best apply it and what quantities to my 8Ltr pot?

Thanks guys.
Will be posting a Journal when she's done and Harvested

You should be able to get the lime at any gardening center and probably places like Lowes/home depot... There will be directions on the bag... Just do it gradually so you dont go the other way... Takes time.

>$5 for a 40lb bag at Lowes.

Why pay to ship ground up rock?

Wet

do they have lowes in the uk?

I use dolomite lime to mix into the soil before planting in it . hydrated lime spread over the top of soil can be watered in after the plant is in the pot . Nice looking pics

Nepaljam x Oaxaca said:

do they have lowes in the uk?

Click to expand...

LOL, no but they do have dolomite or garden lime.

Wet

I would get the hydrated lime as noted above seeing as your going to be adding it into the soil. hydrated lime works alot faster then dolo I am sure the UK has some garden centers, and they will have it there. I see dolo lime at walmart

AFA hydrated lime

Hydrated lime + inexperienced growers = less than good results/outcome

Not knocking hydrated per se, but you can burn the shit out of roots with it if you don't know what you're doing.

It is nearly impossible to over apply dolomite or garden lime, being just ground up rock.

Wet

Just use garden lime, as said above its nearly impossible to over apply and will gradually raise your PH over a few weeks which in turn wont put undue stress on your girl. From past experience i would be adding the lime to the soil before i plant anything in it

thanks for the replies.
Obviously I can't mix anything in with the soil, I can either sprinkle something on top or mix it with water. The eBay item I linked to called it Dolodust, so I'm guessing it's fine enough to dissolve in water?

As a quick fix, I used just 3ltr plain tap water (has a PH of around 8 ) 1/2 teaspoon of Epsom Salts and a couple of drops of PH down. The end result was a PH of just under 7 (I'm using test strips and a PH kit using drops so not so accurate)
Do you think the yellowed leaves will recover? and how quickly should I see results before deciding if it solved the problem?
Cheers

Reiss said:

thanks for the replies.
Obviously I can't mix anything in with the soil, I can either sprinkle something on top or mix it with water. The eBay item I linked to called it Dolodust, so I'm guessing it's fine enough to dissolve in water?

Click to expand...

No it wont dissolve, but it will be a bit more fast acting. Man, I don't see anything undue in the pics. The plant looks really nice. You might wanna wait a bit and make sure that there is in fact something wrong.
You haven't said what soil you're in or what you are feeding.
I don't think I have ever personally seen a true pH lock out. Usually folks who have an Mg def are using one of those "Blooming" formulas with a ridiculously high P, which ends up locking out Mg.
Being in soil, I very seriously doubt that you have a pH issue, especially if you bought that soil. Most, if not all, store bought soils have been limed to a pH of about 6.8 or close enough to it.
It could be that you are just "looking" for problems also

Thanks Jack,
The pictures were taken with the 400W HPS on and she doesn't look bad at all in the pics. But she has very quickly developed Mg deficiency symptoms, pale yellow leaves with dark veins.
She's in BioBizz All mix organic soil.

Fed every watering with 3Ltr Tap water (every 2 days), at the moment she gets 3ml BioGrow (NPK 4-3-6) + 6ml BioBloom (NPK 2-6-3.5) + 2ml TopMax (NPK 0.1-0.01-0.1). I've slowly decreased the BioGrow and increased the BioBloom over the last couple of weeks. She was also flushed last week and had a teaspoon of molasses mixed in.
Other than the yellowing, she looks pretty healthy & starting to get nice & frosty.

Doesn't look like an over abundance of anything, I'd bet the pH of the soil is good, there is a tutorial on checking the soil pH in my journal, so I'd just keep an eye on it. Where is the yellowing happening? Lower older growth?

Pretty much seems to be happening everywhere, though most of the lower growth (below the screen) was removed during veg. I've just turned the light off and taken a photo -

BBYY said:

I would get the hydrated lime as noted above seeing as your going to be adding it into the soil. hydrated lime works alot faster then dolo I am sure the UK has some garden centers, and they will have it there. I see dolo lime at walmart

Click to expand...

Wetdog said:

AFA hydrated lime

Hydrated lime + inexperienced growers = less than good results/outcome

Not knocking hydrated per se, but you can burn the shit out of roots with it if you don't know what you're doing.

It is nearly impossible to over apply dolomite or garden lime, being just ground up rock.

Wet

Click to expand...

Good looking plant Op.


Yep hydrated works fast and can burn just as fast in the hands of the inexperienced. Dolomite is much safer to use by new growers but you need to get it into the mix before you start growing. 3 weeks into flower means you only have 5-6 weeks too go. Top dress with dolomite now and you may start to see benefits from it about harvest time. That plant looks pretty good overall, I dont know that I would make any drastic changes at this point.

Reiss said:

Pretty much seems to be happening everywhere, though most of the lower growth (below the screen) was removed during veg. I've just turned the light off and taken a photo -

Click to expand...

Now that is showing a Nitrogen deficiency, not bad but there so dont let it get out of hand. I would add a tablespoon of Fish Emulsion to your feeding program for the next 3 weeks or so...your plants will thank you for it......so will your yield....

cowboylogic said:

Now that is showing a Nitrogen deficiency, not bad nut there so dont let it get out of hand. I would add a tablespoon of Fish Emulsion to your feeding program for the next 3 weeks or so...your plants will thank you for it......so will your yield....

Click to expand...

I thought Nitrogen deficiency starts at the leaf tips, this is starting all over the leaf, plus the veins are quite dark. Never tried Fish Emulsion, would this help - http://www.gardendirect.co.uk/garden-care/organic-natural-range/organic-fertilizers/fish-emulsion.
Thanks for the reply.

Reiss said:

I thought Nitrogen deficiency starts at the leaf tips, this is starting all over the leaf, plus the veins are quite dark. Never tried Fish Emulsion, would this help - http://www.gardendirect.co.uk/garden-care/organic-natural-range/organic-fertilizers/fish-emulsion.
Thanks for the reply.

Click to expand...

That should work fine. Just check the label for dosage, it may be a bit different from the FE I use.

Reiss said:

I thought Nitrogen deficiency starts at the leaf tips, this is starting all over the leaf, plus the veins are quite dark. Never tried Fish Emulsion, would this help - http://www.gardendirect.co.uk/garden-care/organic-natural-range/organic-fertilizers/fish-emulsion.
Thanks for the reply.

Click to expand...

I couldn't see any problems in the first pics ....in the second i agree with cowboy about N def ( which doesn't always start at the tips) ... you're in the beginning of flower so the stretch is what could be using up your N. That or did you hit it with a bloom food already??? ALSO .. you may not get any green back in your yellowing leaves once you start giving it N again ...it'll more or less retain it for the existing and new growth.

correct me if i'm wrong but your plants look good brotha ... i don't see a prob other than N.