Soil and Compost forum: raising pH/alkalinity

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Name: Lee-Roy
Bilzen, Belgium (Zone 8a)
Irises Lilies Hostas Ferns Composter Region: Belgium
Image
Arico
Oct 24, 2017 4:59 AM CST
Is it possible to keep the pH in a particular spot higher (for specific plants) than the surrounding soil by burying a large piece of rock underneath the roots?

Let's say I have slightly acidic/neutral soil and have a shady border full of ferns, hostas etc...but I want to grow Cypripedium calceolus amongst them (which prefers calcerous soil); can I plant it on top of/amonst a large piece of limestone? It'll be more long term than spreading grains or eggshells on top of the soil every year.

Thoughts?


Thumb of 2017-10-24/Arico/e05cdd

Name: Cindy
Hobart, IN zone 5
aka CindyMzone5
Celebrating Gardening: 2015 Plant Identifier
Shadegardener
Oct 24, 2017 9:02 AM CST
What about sinking a container in the ground with plenty of drainage and filling it with your higher pH amended soil?
Only when the last tree has died and the last river has been poisoned and the last fish has been caught will we realize that we can't eat money. Cree proverb
Name: Lee-Roy
Bilzen, Belgium (Zone 8a)
Irises Lilies Hostas Ferns Composter Region: Belgium
Image
Arico
Oct 24, 2017 10:18 AM CST
Because the orchid will eventually outgrow the basket, a more well drained pot acts as a sump for the surrounding and because the amended soil eventually needs replacing or re-amending which I want to refrain from.
Well not that it would be so much trouble, but I'm curious if my idea would work....
Minnesota (Zone 3b)
RpR
Oct 24, 2017 11:51 AM CST
Pieces of Limestone will affect soil better than a chunk, assuming it works.
[Last edited by RpR - Oct 24, 2017 11:51 AM (+)]
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