As we age, we often find solace and joy in the simple pleasures of life, such as nurturing a garden or caring for houseplants. These green companions not only beautify our homes but also offer a myriad of benefits, from purifying the air to enhancing our mood.
However, to ensure our leafy friends thrive, it’s crucial to understand the nuances of houseplant care, particularly when it comes to fertilisation. Houseplants, much like their outdoor counterparts, require a steady supply of nutrients to flourish.
Andrew Messinger, a seasoned gardener and columnist, explains that while outdoor plants benefit from the natural decomposition of organic matter, houseplants are confined to their pots, often in nutrient-poor media such as peat or bark. This is why adding fertiliser is essential—it replenishes the vital macronutrients (nitrogen, phosphorus, and potassium) and micronutrients that plants need to grow strong and resist pests.
The market offers a variety of fertilisers, each with its own set of advantages. Whether you opt for liquid, granular, or slow-release pellets, the key is to follow the manufacturer’s instructions and avoid the temptation to overfeed your plants. Lisa Eldred Steinkopf, a houseplant enthusiast and blogger, emphasises the importance of using what you have on hand and adhering to recommended dosages.
Liquid fertilisers are popular for their ease of application and quick absorption, but they require frequent reapplication—every one to two weeks. Granular fertilisers are cost-effective and ideal for mixing into the soil when planting or repotting, with reapplication needed every four to six weeks. Slow-release options, such as pellets or spikes, provide a steady nutrient supply over several months, making them a convenient choice for the forgetful gardener.
When selecting a fertiliser, you’ll also face the choice between organic and synthetic options. Organic fertilisers, derived from natural ingredients, are gentle on plant roots and environmentally friendly, though they may have a less concentrated nutrient value and an earthy odour. Synthetic fertilisers offer a balanced mineral blend at a lower cost but can pose a risk of root burn if overused.
For the DIY enthusiasts, homemade fertilisers can be a cost-effective alternative. Simple recipes using Epsom salt, baking soda, and household ammonia can provide essential nutrients to promote growth, blooms, and healthy roots.
Applying fertiliser correctly is as important as choosing the right type. Dilute liquid fertilisers as directed and apply to the soil, not directly onto the leaves. Granular fertilisers should be mixed into the top layer of soil, while slow-release forms vary in application method—always refer to the packaging for guidance.
The fertilisation schedule for your houseplants depends on the type of fertiliser and the season. During the growing months of spring and summer, monthly fertilisation is beneficial. However, in the dormant autumn and winter months, it’s best to hold off on fertilising altogether. Steinkopf advises that if your plants are showing new growth or are grown under lights, you can fertilise every fourth watering or with a quarter-strength solution each time you water.
Overfertilisation is a common issue that can lead to plant distress, including brown spots on leaves, wilting, and leaf drop. If you notice these symptoms, assess the situation and adjust your fertilisation practices accordingly. Too much nitrogen, for example, can cause lush foliage at the expense of flowers, so switching to a balanced fertiliser can help.
In conclusion, understanding when and how to fertilise your houseplants is key to unlocking their full potential. By choosing the right fertiliser, applying it correctly, and adhering to an appropriate schedule, you can enjoy the lush, vibrant greenery that houseplants bring to your home. Remember, a little care goes a long way in the world of indoor gardening.
What’s your experience with fertilising houseplants? Have you found a particular method that works best for your plants? Feel free to share your thoughts in the comments below!
Also read: The sweet trick for a lush, green lawn—no chemicals needed!
