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Acidanthera murielae

I planted these bulbs this year and as you can see, the leaves have grown well but no flowers have appeared. They are against a south facing wall. I have kept them watered throughout the summer. Anyone any idea why they may not be flowering. Many thanks

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If you feed them as they die down it will help for building them up for next year though.
Not hardy everywhere, so that will have a bearing on how you keep them over winter.
I treat them as annuals, as I can't be bothered lifting them to overwinter. Cheap to buy. I keep them in pots in the greenhouse until it's safe to plant them out, and then keep them fed, as @Palustris says. Most do reasonably well. They aren't as easy in pots as they are in the ground either.
I live in west central Scotland - not where that photo is...