Dirty great clumps of greenfly can infest your Lupins.
Lupins can be grown from the seed you collect.
If buying a potted plant see what the colour and spike is like before you buy. A good plant will last several years with little fungal problems.
If you want a second flush of flowers it is best to dead head the spires of blossom. Deadheading saves energy in the plant.
Lupin Problems and Treatments
- Slugs like the tender shoots and snails seem to have attached themselves to the stronger leaves this year in my garden. I need a lot of grit around the base of the plants before they start to grow or to buy some nematodes as the weather improves.
- Green fly gather in great quantities on my second flush of blooms and need to be washed off in soapy water or a systemic insecticide used.
- Weak Lupins or yellow leaves may be caused by too much lime as Lupins prefer an acid soil so apply sequestrine or an acid loving treatment.
- Powdery mildew may affect Lupins. Pull off infected leaves and burn rather than composting them