I've had an amaryllis bulb in a pot for about 5 years now and the bulb hasn't been doing much for, I reckon, over 6 months. When should I consider getting rid of it? Could it have run its course?
My amaryllis bulb is about 26 years old and blooms twice every year without fail. I have it in an east facing window, and I water it as and when I remember! I feed it with Gro-more twice a year as the main stalk starts to show (only adding to one watering each blossoming time). I honestly do not pamper this bulb, never take it out of the window (even in winter but central heating usually keeps house at about 20 degrees), forget to water regularly (sometimes the leaves start to droop a little) and yet it still gives me 2 beautiful displays every year. The bulb has almost filled the pot for the last 6 years, so I took it from the pot 6 weeks ago, cut back the roots (there was very little soil left anymore) and put some new soil in. I thought I had killed it but it is proudly showing 4 deep red blooms on the stalk. I do strip off the dead 'skins' on the bulb when it gets very flaky - a gentle pull brings most of it off. Hope this helps.
My mother started her Amaryllis in 1942. My sister and I divided the bulbs maybe 15 years ago. They didn't bloom for a few years. Now mine blooms every year and my sister's has only bloomed a few times. No explanation... I remember it blooming as a child and I'm 63. So given its history it's 75 years old this year.
I'm going to guess it's a Hippeastrum as you're keeping it in a pot - Amaryllis is often planted outside, whereas Hippeastrum are not. They can live for decades (my mum has one that is at least 50 years old). They will go dormant for part of the year. The main thing is not to overwater them or bury them too deep - my mum's has been half out of the soil. If they sit in cold, damp soil they will rot. Do not water them when they are dormant. Six months sounds like a long time to be dormant. Try shifting it to a warmer, brighter spot. If nothing happens, try lifting the bulbs and have a look - are they firm and plump (like a fresh onion) - if so, plant them again and be patient. If they're rotten or hollow, then I'm afraid you're out of luck.