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I bought a reduced price white currant from HBase the year before last and put it in a large pot about a year later. It still hasn't flowered! I've got black currant and red currant, so any suggestions or advice would be welcome to make up my set :)

Fruitfly

If you haven't already done so, try adding some potassium (potash) this will increase acidity (currants like a slightly acid soil) and promote flowering.

I'll get some - fingers crossed for next year!