How to Treat Root Rot in Lewisia and Fertilization Precautions in Summer

When caring for Lewisia, we may encounter some problems, among which root rot and summer care are the more critical aspects.

Causes of root rot in Lewisia and how to deal with it:

Causes of root rot

Overwatering: Lewisia likes a moist environment, but excessive watering can cause waterlogging in the soil, preventing the roots from breathing properly, which in turn causes root rot.

Poor soil aeration: If the soil used to grow Lewisia has poor drainage and poor aeration, the roots are prone to soaking and oxygen deprivation, which in turn triggers root rot.

Improper fertilization: Over-fertilizing or using unrotted fertilizer can burn the roots and lead to root rot.

Pest and disease infestation: Roots attacked by pests and diseases, such as root rot disease, nematodes, etc., can also cause root rot.

How to deal with root rot:

Remove from the pot promptly: Once signs of root rot appear in Lewisia, the plant should immediately be taken out of the flower pot. Gently shake off the soil around the roots, being careful to move gently to avoid causing further damage to the roots.

Trim the rotten roots: Carefully examine the roots and use sterilized scissors to cut off the rotten, blackened and softened parts. Make sure all rotten roots are removed cleanly until healthy white root tissue is exposed.

Disinfection treatment: After trimming, the roots need to be disinfected to prevent infection by pathogens. The roots can be soaked in a diluted carbendazim solution or potassium permanganate solution for about 20-30 minutes.

Replace the soil: The original soil may already contain pathogens or be unfavorable for root growth, so it needs to be replaced with new soil. Choose loose, breathable, well-draining soil, such as a mix of leaf mold, perlite, vermiculite, etc. in a certain ratio.

Repot: Replant the treated Lewisia into a new flower pot, being careful to press the soil down gently when filling to avoid leaving gaps around the roots. After repotting, water with an appropriate amount of settling water and place it in a well-ventilated, semi-shaded environment to recover.

Fertilizing Lewisia in summer requires special attention to the following points:

Because Lewisia grows relatively slowly in summer, its demand for nutrients is relatively reduced, and over-fertilizing can easily cause fertilizer burn. When fertilizing in summer, the fertilizer concentration should be lower than in other seasons to avoid burning the roots. It is recommended to dilute the fertilizer to half the regular concentration or lower. Thin liquid fertilizer is preferable, such as rotted cake fertilizer water, diluted compound fertilizer solution, etc., and avoid using raw or unrotted fertilizer. Usually, fertilizing once every 2 - 3 weeks is sufficient; fertilizing too frequently will increase the burden on the plant. Fertilizing during the high temperatures at noon may cause the fertilizer to decompose rapidly and generate heat, damaging the roots. It is best to fertilize in the early morning or evening when temperatures are lower. Before fertilizing, carefully observe the plant's growth condition. If the plant shows yellow leaves, wilting or other unhealthy signs, fertilization should be suspended until the plant returns to normal.

Try to apply fertilizer to the soil away from the roots to avoid direct contact with the root system.

When root rot occurs, effective treatment measures should be taken promptly; during summer care, attention should be paid to light, temperature, watering, fertilization and pest and disease control, so as to provide a good growing environment for Lewisia.