How To Grow Lupine Throughout The Season
Growth Habit: These spring-blooming beauties are not tolerant of high heat or humidity. Lupine has a rounded habit and grows from 12-48” high depending on species or variety. Individual flowers resemble those of peas and are densely packed on spikes above the foliage.
Staking: Tall Lupines stand very straight on their own and do not require staking. For Russell species grown in garden settings, you may want to stake flower spikes if you live in an area with high winds.
Watering: For the first few months, make sure that Lupine plants are getting adequate water for good root development (they are deeply rooted), but let the soil dry out between waterings. After that, water only during periods of drought or very dry spells.
Fertilizing & Mulching: Extra fertilizing is not necessary, but a top dressing of compost is appreciated for perennials, as long as it isn’t placed close to the crown of the plant.
Trimming & Pruning: Lupines can bloom again lightly on side shoots if immediately deadheaded. However, if seeds have begun to form in the lower parts of the flower, they are unlikely to repeat their bloom.
End Of Season Care For Lupines
Dividing & Transplanting: Lupines have deep roots and do not transplant well as they get bigger. Lupines do not need to be divided.
Pests & Disease: Lupine can suffer from powdery mildew, particularly in hot and humid climates. There are no other major pests for this plant besides pill bugs (roly-polys, sow bugs) which like to eat the seeds and seedlings.
Additional Concerns: Lupine seeds are actually cultivated as a food crop in some areas of the world, however, we do not recommend using these seeds in any culinary way.