I have read oyster shells are a good ammendment to help balance PH in soil. I am thinking of ordering oyster Shell flower to top dress my plants going into flower tmrw.. my question is tho how long before it starts working in balancing ph? Sent from my iPhone using Grasscity Forum
Might be hard to get a single answer. It depends on a number of factors, one of the biggest is the how fine they are ground. Are you looking for a quick fix to a diagnosed PH problem?
They are a long term usage amendment. I wouldn't count on it instantly balancing PH. It will take some time to be broken down, even the powder. Dolomite lime.
Yeah I mean it seems my PH keeps dipping, I too dressed with dolomite lime and flushed all of my 5 gallon pots with 15 gal of 6.5 ph water and they stayed there for about a week.. I just ph'd soil in one of my plants and it was at 6.1 today... Sent from my iPhone using Grasscity Forum
Dolomite Lime for a quicker PH buffer. But as for a flowering top dress, if you are using a living soil, it balances itself. While flowering, cannabis prefers a slightly acidic soil. So adding a PH buffer is not always best if using a living soil u less you have a serious issue with PH imbalance. This can happen if your soil was not "cooked", given time to break down amendments and build micro-life, before using.
How much dolomite lime per gallon? And how often to reapply? - every couple of weeks or so?.. Sent from my iPhone using Grasscity Forum
They went down to like 5.9 so I flushed them after too dressing with dolomite lime with 6.5 PH water, now it seems to be dropping again, what would you suggest I do? Sent from my iPhone using Grasscity Forum
2Tbl/gallon of mix, or, 1cup/cf of mix. Applied ONCE/grow and best added when constructing the mix, but a top dressing will work but takes longer. Takes a couple of weeks at least when added to the mix and that's the "fast" way. pHing the water does not do diddly squat to soil pH. The soil pH WILL affect the water and bring it to match the soil's pH. IOW, use lime from the get go in your next mix, or when you recycle this one. Just need to do it once/grow in most cases.
Thanks for the advice, I learned my lesson and will make sure it's added before planting next time Sent from my iPhone using Grasscity Forum
I don't use it but I think 1 tbs per gal once a week is an ok application. But just re-read your post and if you recently flushed did you top dress the DL after or before? Why were you flushing?
I was flushing to remove a nutrient build up and hoping it would help elevate my PH, yes I did top dress somewhat with dolomite lime but it doesn't seem to be doing much I hope I didn't knock it out or something during flush Sent from my iPhone using Grasscity Forum
So are you saying if I'm growing in a 10 gallon pot then I should add 10 tablespoons of dolomite lime as a topdress every week?
No I was saying that I don't use it but from what I know I think 1 tbs per gallon of water once a week would be ok. He said he already top dressed with it
no that's absolutely not how you use lime. not to be a dick but if you dont know its better to not guess. further more, someone just answered above you, im going to assume you haven't even read the replies.