It's great to hear that you haven't seen any fungus gnats flying around, and that you've observed some positive response in the growth tips of your plants. However, if not all of your plants are showing signs of recovery or if there is only slight growth, there may be other factors at play that are affecting their overall health and development.
Here are a few additional considerations:
1. **Damage from Previous Infestation**: Even though you've successfully controlled the adult fungus gnats with larvicide, the damage caused by their larvae may still be affecting some of your plants. Larvae feed on plant roots, which can lead to stunted growth and decreased nutrient uptake. It may take some time for affected plants to fully recover, especially if the damage was severe.
2. **Nutrient Deficiencies**: Fungus gnat larvae feeding on plant roots can disrupt nutrient uptake, leading to deficiencies that can impact growth. Consider supplementing your plants with a balanced nutrient solution to ensure they have access to essential nutrients during recovery.
3. **Environmental Stress**: Environmental factors such as temperature fluctuations, humidity levels, and light intensity can also affect plant growth and recovery. Ensure that your plants are growing in optimal conditions and make any necessary adjustments to their environment to promote healthy growth.
4. **Root Health**: Check the root health of your plants by carefully examining the roots for signs of damage or rot. Healthy roots are crucial for nutrient uptake and overall plant health. If you suspect root damage, consider repotting your plants into fresh soil or a well-draining growing medium.
5. **Patience**: It's important to be patient and give your plants time to recover from any stress or damage they may have experienced. Growth may be slower initially as the plants redirect energy towards repairing and regrowing damaged tissues.
In summary, while controlling adult fungus gnats with larvicide is an important step in managing an infestation, it's also essential to address any lingering effects on plant health and growth. By providing optimal growing conditions, supplementing with nutrients as needed, and monitoring plant health closely, you can help support the recovery of your plants and promote healthy growth.