Posted: 05/06/2014 at 19:26
Yes, I stake them. Do this early when you see the beginning of the flower stems.....a cane, short one because its the lower parts that are likely to snap, per spike. Mine have already been done. The first strong wind or heavy rain will flatten unstaked lupins. When the flowers are starting to fade remove them to where you will see new shorter flower spikes forming. These will be smaller shorter flowers. You may even see a third set after that.
Finaly, I remove all stems to ground level, cut off all yellowing leaves, feed and put half a dozen slug pellets (or visit your plant in the dark with torch and salt solution) for an imvasion of small snails. Lupins look very, very tatty for a few weeks after flowering but look good...foliage wise....during autumn and winter.
Lupins are short term perennials....good for 3 years I think but then best replaced. There are now some fantastic varieties......I intend to try a few of these myself.