Cooled black tea, applied about once a month, can serve as a natural nitrogen feed to help orchids stay healthy and rebloom through autumn and winter, according to scientist-turned-gardener Mary Ellen Ellis of Gardening Know How.
Orchids are among the most popular houseplants, yet encouraging them to flower again after their first display often proves difficult. Once the vibrant blooms fall, many owners wonder whether the plant will ever flower again. Feeding is vital for keeping the plant content and thriving, especially as potted specimens gradually use up the nutrients in their growing medium.
A Common Cupboard Staple as Orchid Feed
Ellis suggests that an expensive specialist feed is not necessary. Instead, cooled, brewed tea can be used as a gentle homemade source of nitrogen for orchids. Nitrogen is essential for healthy plant development, but orchids cannot absorb it in the same way as many plants grown in soil. Black tea offers a straightforward way to supply this nutrient without buying a dedicated orchid feed, and it is remarkably simple to apply.
How to Make and Apply the Feed
To use the feed, brew a cup of plain black tea and allow it to cool completely before watering the houseplant. The crucial point is that the tea must be sufficiently cool before it touches the plant, or it could kill it. There is no need to brew the tea especially strong or add anything extra; the purpose is simply to use the cooled tea as part of a gentle feeding routine.
Why It Works and the Risk of Overfeeding
Nitrogen is among the essential nutrients plants need for robust growth. Ellis noted that many commercial fertilisers use urea as their nitrogen source, but orchids cannot absorb nitrogen from urea in the same way as soil-grown plants. In their natural habitat, orchids draw nutrients from decomposing plant material around them, but a potted specimen lacks that natural provision.
While it may be tempting to assume that more feed leads to more blooms, the gardener cautioned that orchids are highly susceptible to overfeeding. This is why the technique is advised only once monthly during autumn and winter, rather than weekly. Feeding black tea can assist an orchid in reblooming, but only when other needs such as light, temperature, and humidity are also met.
Alternative homemade feeding options include banana peels, eggshells, milk, and rice water, each providing different nutrients that can support orchid development.
