Causes and treatments for yellow leaves on lupine

1. Unsuitable environment

Reason: Some lupines that have just been potted may not be able to adapt to the sudden changes in the environment. Even though it has strong adaptability, it still takes some time to adapt to a new environment, and the leaves may turn yellow during this process.

Measures: In this case, you can wait quietly for it to recover and adapt to the new environment. You can also adjust its maintenance environment according to its growth habits to help it adapt.

2. Unsuitable soil

Reason: Lupins need to be grown in well-drained, loose and fertile acidic soil. It has a well-developed root system, which makes it easy for it to absorb nutrients from the potting soil in this kind of soil. If the soil in which it is grown is alkaline and compacted, it will make it difficult for its roots to absorb nutrients, resulting in poor plant growth and yellowing of the leaves.

Measures: You can consider directly replacing it with loose, fertile, slightly acidic sandy soil. The soil pH should be lower than 5.5. If you do not want to change the soil, you can also add sulfur powder to alkaline soil.

3. Too much light

Reason: Lupine is light-loving and requires sufficient light in all four seasons to promote its growth. However, the sunlight is too strong in summer. If the plant is not shaded, it will be sunburned, causing the leaves to turn yellow.

Measures: The sunlight is too strong in summer, so it needs to be moved to a cooler and more ventilated place indoors to allow it to recover from high temperature burns. After that, you can move it to an environment with scattered light for maintenance, and the leaves will slowly recover.

4. Too much water and fertilizer

Lupine is a wild species with strong adaptability, so its requirements for water and fertilizer are not very high. In daily maintenance, do not water and fertilize too frequently, otherwise it will cause its roots to rot and the outside of the branches and leaves will turn yellow.

Measures: When there is too much water and fertilizer, the plant must be removed from the pot in time. Cut off the rotten parts of the roots and then replant them in acidic sandy soil.