Please help identify what is wrong with this lupin

Hello folks,
I have 9 lupins growing in a row. I grew 8 of them from seeds but this one, recently purchased from a garden centre (to fill the gap after an older one failed to come through) suddenly drooped its flower (I pruned it) and the leaves became pale and discoloured as you can see compared to its neighbour to the left.
What can I do to help it?
Many thanks in advance.


The rest are doing pretty well with slug pellets and bug spray.



I actually grew more than 40 from seeds last year and ended up giving a lot away.



I like lupins

 

Looks like mildew, which is common in Lupins, but usually only in hot dry conditions [ not this year ] The treatment is regular watering.

 

Thanks, I went out and watered it immediately and will continue regularly.

 

I agree it looks like mildew … it may well have been allowed yo dry out while in the pot at tge garden centre.

 

I agree re the mildew- they're quite prone to that if you're in a drier area, but the likely reason your others are also doing better is because they've been well accustomed to your conditions as you've grown them from seed, and pricked out/potted on and planted out at a suitable time.

 

They look beautiful, @David F, and what a lovely planting spot for them where they can be seen in all their glory.

 

Lupins are legumes. The newly planted may not yet be innoculated with the necessary microbes and therefore not receiving the same nitrogen that the older established plants are capturing. I suggest that you foliar feed it, using rain water not chlorinated tap water .It may also still be under the influence of growth regulator used to provide 'shelf -life' to factory produced plants.