Knowledgebase

Testing soil for ph of indoor plants #924401

Asked February 10, 2026, 8:11 AM EST

Would you recommend a meter to test the soil of my indoor plants and if so which ones do you find work best?

Ramsey County Minnesota

Expert Response

Thank you for writing. 
pH meters are rarely needed for indoor plants except azaleas and philodendrons which require very acid conditions. See bottom section here. https://soiltesting.cahnr.uconn.edu/plant-ph-preferences/

pH metering is a simple technology and indoor pots are an easy testing environment. Inexpensive meters are available at any garden store.
pH problems are rarely a prime cause of indoor plant distress. Poor drainage, improper lighting, and water from a home water softener are the most frequent environmental problems for indoor plants. If you have a water softener, use bottled, non carbonated water for plants.
Steve Miles, Master Gardener, Hennepin County MN (I am a human being, not a bot nor AI). I am an avid gardener but am not a degreed or certified horticulturist or arborist. I am happy to receive follow-up questions if my responses are incomplete or unclear.  This is the University of MN' garden soil testing service.  https://soiltest.cfans.umn.edu/testing-services/lawn-garden This is guidance on how to find a tree expert.  https://extension.umn.edu/planting-and-growing-guides/how-hire-tree-care-professional The Minnesota Landscape Arboretum is a wonderful place to see and learn about plants that grow in Minnesota. https://mngardens.horticulture.umn.edu/minnesota-landscape-arboretum Replied February 10, 2026, 9:32 AM EST

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