I planted two Kniphofia caulescens in a sunny spot in my garden back in 2016. The plants have thrived and now form a sizeable clump. However, they haven't flowered for several years. Any idea why this might be? I live in west Essex, England. The soil is heavyish clay.
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I'd slice into the clump and move some roots to different locations and to pots with lighter soil mix. They like drainage.– Yosef BaskinAug 31 at 14:24
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