Gardening and Landscaping Stack Exchange
Gardening and Landscaping Stack Exchange

Questions tagged [ph]

pH is a numeric measure of how acidic or alkaline the soil or other growing medium is. Acidic soils have low pH and alkaline soils have high pH. Use this tag for questions about measuring or adjusting the pH of your soil.

Related tags:

  • for other questions about changing the soil composition.

External links:

  • Wikipedia on pH
55 questions
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Elephant garlic Allium ampeloprasum struggling, difficiencies?

I noticed that these Allium ampeloprasum started a couple months ago, are struggling and showing some deficiencies that I can't pinpoint. My soil is sandy and poor, with pH slightly over 8. I gave it plenty of NPK, but I have a doubt that it's…
ammoun
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Lowering Soil pH with Diluted Sulphuric Acid

I want to lower my soil pH from 7 to 4.5 with dilute sulphuric acid. It's time to buy potted blueberry plants here in El Dorado County, CA (Zone 9A) so I would like to adjust the pH quickly rather than waiting for elemental sulphur to convert to…
Anthony
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Will citrus recover from alkaline soil/fruit drop?

Recently bought a place with orange, Clementine, lime, grapefruit, and lemon trees. New to growing citrus and did not test soil so did a fantastic job of nearly killing them all. Our soil ph is 8.5, very alkaline. Am adding about 2" of peat moss all…
Lorelei Kornell
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Brussel Sprout Seedlings Hardy?

I got my Brussel sprouts started early. They are in the ground (zone 5), but I think we are getting one more 30 degree frost on Friday. They are small little seedlings right now. My question is, can they stand a frost even in the seedling stage or…
Benjamin Hobson
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How much KHCO3 is needed to buffer RO water?

Hy, how would you make a buffer solution with KHCO3 (Potassium bicarbonate) to have a pH of around 5,5–6. It would be used in a hydroponics system to make a buffer solution in RO water (demineralized) that can resist the acidic nutrient fertilizer.…
Krisztian Komjati
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Hydroponic feeding times and scheduals

I am having some weird readings that do not strictly go against what I have researched but seems I may be missing something. I am growing Tomatoes and cucumbers along with one small chilli plant. At the beginning of the week I start a new cycle and…
Spider999
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What should general PH and nutrient levels be for new planting bed after amendments?

I am planting a salad garden with lettuces, kale, spinach, root crops, pole beans, tomatoes, peppers, and cucumbers. So many different PH level requirements and such for different plants are confusing me because I have grown them all together before…
TauraBird
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Plants for under blue spruce tree

Along the west fence of my yard, just on the other side in the neighbours yard, are three towering blue spruce trees basically stacked on top of each other. Because of this, the grass doesn't grow that nice on my side of the fence about 8 feet…
Scorb
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What natural substance can I use to up the pH balance?

What can be used as a natural pH up substance for my medical marijuana plants water? I have them growing in soil & have been using citrus powder to lower my ph.
Ashtyn
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How to make a KHCO3 Buffer solution in RO water based hydroponics system?

Hy, how would you make a buffer solution with KHCO3 to have a pH around 5,5–6. It would be used in a hydroponics system to make a buffer solution in RO water (demineralized) that can resist the acidic nutrient fertilizer. Unfortunately, the pH drops…
Krisztian Komjati
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