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Lowering Greenhouse Soil pH for Pansies

Target pH 5.5–5.8 for pansies. West of Mississippi soils tend alkaline (7.5). Lower with ground rock sulfur (5 lbs/100 sq ft). Raise with agricultural lime. Best long-term: amend with peat, compost, manure to buffer near 7.0.

Application

Test soil first.
Apply sulfur evenly, water in.
Retest in weeks.

Organic matter stabilizes pH naturally.

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