My Run off

Question

Good morning/afternoon  I'm just nearing a month into my last soil grow before I switch to coco.  I've been following an old diary of mine but on this occasion I thought I'd feed them some calmag 🙄 so just as a precaution) because almost everytime near the end of the grow I end up with a cal or mag deficiency that I can never seem to fix.  So just as a precaution and on 2 occasions now I've fed the 6 plants of mine half strength doses of calmag I've now laid off the stuff. As I believed I'd be doing more harm than good  Every feed before this has been just plain mineral water with a pH of 6.5 and I have only been giving the plants a small amount of water which wasn't providing me with any run off.  I've now switched to tap water instead of continuing to use mineral water.  Just earlier before lights out I feed the plants ph 6.2 adjusted tap water that I let sit for 48 hours .. the RO came out at 5.1 which makes me think I'm on the verge of a lock out. I'm thinking that I'd need to go an flush them all but I'm just unsure if that's the best course of action  Please could someone advise me  Cheers.

StarCodex · Answer

I forgot to mention the soil is B&Q verve. I just did a little test that I read on a blog on the fox farms website.  I got some of the verve soil and mixed it with PH adjusted water and the run off was even lower at pH 4.9 Id be running off to the shop to get dolomite lime but I can't get that anywhere. So I thought what if I flushed the plants with my soft tap water with its pH value of 7.8 surely that might bring the pH up nearer 6

jacks_farm · Answer

Sounds like you live near me and my local shop (the range) sells garden lime.

jacks_farm · Answer

your soil ph range is a little low and not sure the tap water will balance it out, if you can't get any lime I have crushed one egg shell up into dust and used this to adjust the soil ph level in one 15ltr bucket as the acid in the soil will dissolve the egg shell and raise the ph level upto 6.8  it's not great but it will help

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