Blind Daffodils

[Brazilagogo]

Does anyone know if daffodil bulbs which have gone blind will ever reflower if I feed them up - and if they do, what is the best way to feed them up?

Yes, they will. Even without feeding. Unless they’re really crowded, in which case digging them up and splitting them is advised.

Mine didn't. I planted them earlier and deeper and they still didn't bloom. Waste is time.

Mine did. My gardener dug out my 40 year old compost heap and generously shovelled it around the equally old daffodil clumps.
The following spring onwards the blind and meagrely flowering ones have erupted in glorious bloom.

I planted them in September 2021 and some definitely flowered last year but his year they look much thinner. There is one clump where only one has flowered but the leaves from the others have come up. I can’t imagine they will have become so overcrowded in that time.

I’ll give them the benefit of the doubt and leave them in situ this year with a dollop of compost and see how they go.

If they were only planted in 2021 they are probably not crowded. Maybe not planted deep enough. They should be at least twice the height of the bulb below the surface. If they are too dry in summer they suffer. Give them a good feed with a slow release fertiliser and mulch over the top with bark may help.

Yes, some species don’t like getting dried out in summer. (I wonder if that’s why our native ones are confined to the wetter west of the country?) I’ve killed daffodils by having them in too dry a place.

Tomato fertiliser/food works, if you have any. I use it for flower bulbs because I grow tomatoes, so I already have the fertiliser to hand. Otherwise I'd use any fruit or flower fertiliser you happen to have available.