Why did my lupines die?

Asked By: Abdeslem Naji | Last Updated: 8th June, 2020
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the cause of lupin sudden death has been identified as a root rot caused by the soil-borne fungus Phytophthora. Accordingly, the disease will now be known as Phytophthora root rot of lupins.

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In respect to this, why are my lupines dying?

Soil that is too heavy, too wet or has too high a pH causes iron chlorosis, signaled by a yellowing of the lupine leaves, and root rot caused by fungi of the Rhizoctonia and Fusarium genera. Root rot inhibits seed germination and causes a general decline of the plant.

Also, do you cut off dead Lupin flowers? Lupines generally bloom from late spring into early to midsummer, depending on the variety. When most of the flowers on a spike have faded and before they've dried and set seed, deadhead by cutting the spike off with a sharp knife or garden shears.

Similarly, you may ask, do lupines die back?

Lupine stalks can be cut back in mid August, or any time after the seed pods have opened (or you have gathered them). The leaves will be building root reserves for next year's flowering until they die back in November. They will bloom starting in June of their second year.

How do you take care of lupins after they bloom?

Lupins prefer well-drained soil which isn't too rich. Lupins do not take too kindly to being chopped back hard after flowering - they take months to recover. If you have a good plant, don't let it produce lots of seeds. Keep the vigour in the parent plant and deadhead as the flowers fade.

38 Related Question Answers Found

Why do lupins get mildew?

Cut away all the Mildew leaves on the plant to stop it spreading to new growth. Often the cause of mildew on a lupin is due to a spell of warm weather followed by no rain or infrequent watering. Ideally its good to really water the plants a couple of times a week with lots of water rather than a small shower each day.

What is eating my lupins?

Slugs will eat bran before anything else, even my lupins. The bran swells inside them, and then they explode.

What's eating my lupine leaves?

3 Answers. Lupins are notoriously susceptible to slugs and snails, which never go further than they have to from their retreat. My guess would be that somewhere near the lupin that is being eaten a snail lurks beneath a flowerpot or a brick.

How do you treat powdery mildew on lupins?

To control powdery mildew on plants, mix together the following:
  1. 1 tablespoon of baking soda.
  2. 1/2 teaspoon of liquid soap.
  3. 1 gallon of water.

Why are my Lupin leaves turning white?


Powdery mildew – Gray, white, or black powder appears on the leaves of plants having powdery mildew. This is usually a result of too much or improper watering. Remove affected parts of the plant and be sure to water only the base of the plant, keeping the leaves dry.

Will lupines grow in Virginia?

Among other things we decided to try lupines as annuals, rather than perennials. There are over 80 Lupinus species, and from one of the native plant experts at work, I was surprised to learn that L. perennis is native here in southeastern Virginia, and is tolerant of our hot and humid summers.

Do lupins flower more than once a year?

Lupins from Seed or Plants? Lupins are perennial (i.e. they come up year after year) shrubs which start into growth after the last frosts, produce their first flush of flowers in late May / June and can continue flowering into early August if dead-headed correctly (see below).

Do lupines need to be staked?

Lupines do not need rich loam, but it is important to grow the plants in very well-draining soil to avoid root rot. The tall Russell lupine hybrids may benefit from staking. You can use grow-through grid stakes to avoid having to tie individual stalks to stakes.

Is Lupine invasive?


A similar species in Minnesota is Large-leaved Lupine (Lupinus polyphyllus), a non-native introduced by gardeners which has become invasive especially along the north shore of Lake Superior. It is overall a larger plant with taller spikes and 9 to 17 leaflets.

Can lupins be moved?

When you move a complete plant, you usually need to cut back the foliage to compensate for cutting back the roots. And that means loosing flowers. As Alice and Lollipop have said, Lupins have a tap root and are unlikely to survive any move.

Does lupine bloom all summer?

The stage at which you plant a lupine will largely determine when it blooms. If planted from a nursery transplant, lupines will likely bloom in spring or summer. Lupines planted from seed in spring won't bloom until late summer or fall. In some cases, these lupines might not bloom until the following spring.

How do lupins spread?

Individual lupines plants do not spread. As they get older the root gets bigger and sends up more flower stalks. Lupines, do, however, produce dozens of pealike seeds per plant, which are dispersed when the pods pop open in late July or early August.

How do you transplant lupins?

Pile them up and load them into a pail or wheel barrow. Keep the roots wet and out of the sun. If potting them up it is best to get them into the pots right away. If the plants are going to be moved to another garden put them in a plastic bag with some water and transplant them as soon as possible.

Can you grow lupins from their seed pods?


Lupines grown from seeds may produce blooms the first year. Pick the lupine seeds from plants when the seed pods turn yellow and rattle inside the pod when shaken, somewhere from June through August. Carefully pick the pods so they do not explode. Lupine seeds seem to germinate better after cold treatment.

Do lupins multiply?

Lupines reproduce in the wild from seed germination and from rhizomes, or shoots emerging from underground stems. Wild lupine seeds may germinate the same season they appear, or they can remain dormant for at least three years.

What soil do lupins like?

Lupins enjoy full sun or dappled shade. The ideal soil is moist but well-drained and can be acid, chalky or neutral. Like many other perennials with tall flowers, they will benefit from a sheltered position. Dig a planting hole in a well-drained soil.