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Fertilizing low light indoor plants is an integral part of keeping them healthy. Although these plants can tolerate low light conditions, they still require essential nutrients to grow.
The first thing to understand is that fertilizing your indoor plants is not the same as feeding them. While sunlight (or artificial lights) provides energy for the plant to photosynthesize and produce its own food, fertilizers supply the minerals and nutrients that plants need to grow and flourish.
Understanding Fertilizers
Fertilizer labels usually include three primary elements; nitrogen (N), phosphorus (P), and potassium (K), typically shown in a ratio like 20-20-20. Nitrogen promotes leaf growth and contributes to the green coloration, phosphorus is essential for root and flower development, and potassium aids in overall plant health and disease resistance.
The Right Time To Fertilize
Low light houseplants typically have slower growth rates, therefore they don’t need as much fertilizer as their sun-loving counterparts. Over-fertilizing can burn the plant roots and cause yellow leaves. Indoor plants are generally fertilized during their active growing season, typically spring and summer. During autumn and winter, most indoor plants enter a dormant period where growth slows and less to no fertilizer is required.
Choosing the Right Fertilizer
Liquid fertilizers are preferred for indoor plants because they can be more easily absorbed and give the plant owner better control over dosage. A balanced 20-20-20 fertilizer is a good starting point for most low light houseplants. However, some plants may have specific dietary needs. So, researching the specific plant type is advised.
Application of Fertilizer
Before applying the fertilizer, it’s crucial to water the plant thoroughly. This will prevent the roots from absorbing too much fertilizer and potentially getting burned. When applying fertilizer, follow the package instructions on dosage carefully. Over-fertilizing can do more harm than good.
Common Low Light Indoor Plants and Their Fertilizer Needs
- Snake Plants: A balanced 20-20-20 fertilizer once a month during the growing season is sufficient.
- Pothos: Pothos can benefit from a balanced 20-20-20 fertilizer every 2-3 weeks during their active growth phase.
- ZZ Plants: A slow-release fertilizer applied once at the beginning of the growing season works well.
- Dracaena: Dracaena prefers higher nitrogen levels, so aim for a 3-1-2 fertilizer every 4-6 weeks during the growing period.
- Spider Plants: A balanced, water-soluble fertilizer every 2-4 weeks is ideal.
In conclusion, remember that the key is an appropriate balance. Seek the right combination of low light, correct watering, and appropriate fertilization. It’s better to under-fertilize than over-fertilize. Observing your plants’ behaviors will help you determine their specific needs and cater to them appropriately.
