Pansies grow best in rich, moist, well-drained soil high in organic matter. Add peat or composted manure to enrich your soil. Pansies will develop best when night temperatures are in the 40 s and day temperatures are in the 60 degree range. They are extremely cold hardy though, and can survive temperatures as low as 10 degrees if properly hardened. When planting, water in with root stimulator fertilizer.
Pansies are heavier than normal feeders.
Keep old flowers pinched off to force more blossoms. Pansies will slow down in hot temperatures. Pinch back, keep well-watered, mulch to keep roots cool and wait for a repeat show in fall. Pansy Partners Spring. Combine pansies with primroses, late blooming bulbs and early vegetables such as frilly red lettuce and cabbage.