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Mastering the Art of Goldfish Plant Cultivation: A Comprehensive Guide

By Adam Morris
Share to PinterestEasy Tips for Growing the Unique Goldfish Plant
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Part of the fun of choosing houseplants is finding one that you’ve not seen before. The fascinating and attractive Columnea nematanthus, or goldfish plant, is a flowering tropical that grows long, trailing stems, with gray, green, or purplish leaves. The plant gets its name from its bright yellow, red, or orange goldfish-shaped blooms. Although it can be a bit finicky about its environment, once you get the hang of the goldfish plant’s growing habits, you’ll become a true fan.

01

Columnea is temperature sensitive

Share to Pinterestensure goldfish plant has the right temperature

The most important thing to remember about goldfish plants is that they prefer temperatures between 65 and 75 degrees. If its surrounding environment is too cold, it will drop its leaves, then die. Tropical plants like Columnea are protected by the canopy of plants and trees in their native habitats, so they don’t thrive in temperatures that are too hot, either. High temperatures not only cause its lovely blooms to fade early but can also create an ideal environment for spider mites.

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02

It’s a superb houseplant

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You may experience a few challenges if you’ve never grown a goldfish plant before, but the results will thrill you as soon as you see the first blooms appear. Goldfish plants need between 12 and 13 hours of bright — but not direct — sunlight every day. If you don’t have a spot in your home where the plant will receive sufficient light, try adding a grow light. Well-lit bathrooms and kitchens are great spots for these plants due to the added humidity levels.

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03

Grow outdoors in some areas

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Depending on your location, it’s possible to grow the goldfish plant outdoors. Avoid planting them in areas with direct sun. While they are humidity tolerant, you’ll need to monitor the amount of water and sun exposure they get. It’s easier to plant them in hanging baskets and containers when placing them outside. Move them inside during inclement weather or when the temperatures get too hot. One of the top varieties for hanging baskets is the Columnea Gloriosa, which grows long, reddish-orange flowers and vines that cascade luxuriously over the edges of the basket.

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04

Light soil, small pots work best

Share to Pinterestperlite vermiculite sphagnum moss
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The goldfish plant prefers shallow pots and a coarse but light soil or growing medium. Though the leaves can appear almost succulent-like, the goldfish plant is not adept at retaining moisture. Your plant will thrive in equal amounts of sphagnum moss, vermiculite, and perlite. Or, try using two parts of a quality potting soil mixed with one part perlite. Don’t worry if your goldfish plant becomes rootbound — they prefer it. Repot the plant every two to three years, but only go up a single size.

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05

They prefer mild to moderate humidity levels

Share to Pinterestgive goldfish plants moderate humidity

To keep your goldfish plant thriving, mist it every day with room-temperature water to increase humidity levels. Never mist with cold water or you risk damaging the leaves. If the air is still dry despite your misting efforts, try setting up a humidifier in the room. Water the plant thoroughly from spring through fall and less frequently during the winter. You’ll know it’s time to water when the top two inches of soil have dried.

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06

Its blooms are captivating

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There’s nothing quite like seeing a goldfish plant in full bloom for the first time. Its brightly colored, tubular flowers resemble a school of goldfish. These plants bloom in spring and summer, but some home gardeners report year-round blossoms for indoor plants. The wide range of available flower and foliage options is part of the appeal.

  • "Chanticleer" presents yellow blooms edged in red with ovate leaves
  • "Superba" has orange-red solitary flowers and maroon foliage
  • "Variegata" blooms scarlet red flowers and has gray foliage with cream margins

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07

Fertilize during blooming season

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Use a fish emulsion fertilizer, which is fast-acting and organic, to boost flower production during the goldfish plant’s blooming season. This fertilizer is rich in potassium, nitrogen, and phosphorus, with trace amounts of calcium, magnesium, and other elements. A half-dose of high-phosphorus fertilizer, like a 10-30-10 blend, every two weeks works well, too.

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08

Pests and disease can be a problem

Share to Pinterestpests disease goldfish plant aphids
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As with most plants, specific pests may seek a home on the goldfish plant. Check your plant regularly for signs of aphids, spider mites, and scale bugs, and use insecticidal soap to get rid of them. These plants are also prone to fungal leaf spots and botrytis mold. Mosaic viruses are common, causing yellow, white, or green spots or streaks on the plant’s leaves and stunting growth. Remove infected leaves and dispose of them.

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09

More tips for the goldfish plant

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Legginess is one of the top complaints about this plant. Usually, excessive length indicates that the plant isn’t getting enough light. Pinch or trim the tips to encourage a bushier plant with more blooms.

Want more goldfish plants? Simply propagate a new Columnea by cutting off a two- to three-inch stem tip that doesn’t have flower buds. Dip the cut end in rooting hormone before planting and place in a bright area. You’ll soon have a new plant from your cutting.

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10

It’s related to the African violet

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Columnea is an epiphyte, which is a type of plant that grows on other plants, or in some cases, a power pole, fence, or building. Epiphytes often perch on the top of trees in their native tropical habitats. They obtain nutrients from the air, dust, water, and debris around them, not from their roots or the plant that they’re growing on. Goldfish plants are cousins to the African violet.

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11

Watering depth and frequency

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Watering the goldfish plant requires a delicate balance. While it's essential to maintain moisture, overwatering can be harmful. It's crucial to check the top inch of the soil regularly. If it feels dry, it's time to water. However, avoid drenching the soil, as this can lead to root rot. Instead, aim for consistent moisture levels. Remember, the goldfish plant, like many tropical plants, prefers a consistent watering routine that mimics its natural habitat. By mastering the art of watering, you'll ensure your plant remains vibrant and healthy.

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12

Ideal soil mix

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The right soil mix is pivotal for the goldfish plant's growth. A blend of peat moss, perlite, and regular potting soil offers the perfect environment. This combination ensures the soil drains well, preventing waterlogged conditions, while retaining essential moisture. Over time, soil can become compacted or depleted of nutrients. Refreshing the mix every so often can rejuvenate your plant, providing it with the nutrients it needs to flourish. Remember, a plant's growth and health are often a reflection of its foundation, so invest in quality soil.

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13

Sunlight precautions

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Sunlight is vital for the goldfish plant, but there's a fine line between just right and too much. Direct sunlight can scorch the leaves, causing them to lose their vibrant green hue. Instead, aim for a spot that offers bright, indirect sunlight. If you notice the plant's leaves turning yellow or developing brown spots, it might be receiving too much direct sun. Adjust its position as needed. By ensuring your goldfish plant gets the right amount of sunlight, you'll be rewarded with lush growth and vibrant blooms.

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14

Fertilizer recommendations

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Nourishing your goldfish plant is essential for its overall health and vibrancy. A balanced houseplant fertilizer, diluted to half the recommended strength, provides the nutrients it craves. However, it's essential to avoid over-fertilization, which can harm the plant. During the growing season, from spring to fall, feed your plant every two weeks. This regular feeding schedule, combined with the right dilution, ensures your plant gets the nutrients it needs without the risk of nutrient burn, leading to healthier growth and more abundant blooms.

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15

Pest management

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No plant is immune to pests, and the goldfish plant is no exception. Regularly inspect your plant for signs of aphids, mealybugs, or other common pests. Early detection is key to managing and eliminating these unwanted guests. If you spot pests, consider organic solutions like neem oil or insecticidal soap. These treatments are effective yet gentle on the plant. Regular inspections and prompt action will ensure your goldfish plant remains pest-free, allowing it to grow and bloom without hindrance.

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