How Home Depot Data Reveals the Hidden Cost of Ignoring Soil pH
https://www.scribd.com/document/993515852/Stop-Killing-Your-Houseplants-A-Practical-30-Day-Rescue-Plan-for-Homeowners-in-Their-30s-50s-169836
62% of Home Gardeners Don’t Test Soil pH — The Data Suggests That’s Costing Yields The data suggests many home gardeners are flying blind