Birthday
HydrangeasGrowing kiwi from the seeds of a shop-bought fruit is a fun experiment that even a beginner can manage. The tiny black seeds grow into an attractive vine with large, velvety leaves. Here is how to sprout the seeds, how to care for the seedlings and whether you can expect a harvest on your windowsill.
What to know about kiwi
- Kiwi is the fruit of Actinidia deliciosa, a deciduous vine native to the Yangtze valley in China. It used to be called "Chinese gooseberry".
- The name "kiwifruit" was coined in New Zealand, where the fruit began to be grown commercially in the 20th century.
- On average, 100 g of kiwi contains more vitamin C than an orange.
- Actinidia is dioecious: male and female flowers grow on separate plants. You need both for fruit, and a seedling's sex only becomes clear when it first flowers.
- Young actinidia shoots attract cats, which may chew the plant.
How to prepare the seeds
- Choose a ripe, soft, undamaged fruit. An ordinary supermarket kiwi will do.
- Cut the fruit open, scoop out the pulp with the seeds and mash it in a glass of warm (not hot!) water. The seeds will separate and sink.
- Rinse the seeds in a sieve so no pulp remains — otherwise they may go mouldy — and dry them on a paper towel.
- For better germination, cold-stratify them: place the seeds on damp cotton wool or a tissue in a container and keep it in the fridge for 2–3 weeks.
Sprouting and sowing
After the cold period, move the seeds onto fresh damp cotton wool in a saucer, cover with film or a lid and place somewhere bright and warm (20–25 °C), out of direct sun. Air them once a day and keep the cotton moist. The first roots usually appear in 1–3 weeks.
Carefully spread the sprouted seeds on the surface of light, nutritious compost with drainage at the bottom of the pot and cover with about 0.5 cm of soil. Mist with water, cover with film and keep in bright indirect light. Once the seedlings are sturdy, gradually remove the cover.
Caring for young plants
- Potting on. At 3–4 true leaves, move the seedlings into individual pots and keep the strongest plants.
- Light. Kiwi loves light: give it the brightest windowsill and a grow light in winter.
- Watering. Regular, without letting the root ball dry out, but without waterlogging. Water less in a cool winter spot.
- Support. It is a vine, so add a trellis or stake and pinch out the tips over time to encourage branching.
- Summer outdoors. Once the weather is warm, the pot can go out onto a balcony or into the garden.
Will it bear fruit?
The honest answer is that you shouldn't expect a harvest indoors. Kiwi seedlings take 4–6 years or more to flower, a mature vine grows several metres long, it needs a cold winter period, and fruiting requires both a male and a female plant. So a windowsill kiwi is more of an attractive ornamental and a fascinating experiment.
If you want your own harvest in Ukraine, look at frost-hardy species: hardy kiwi (Actinidia arguta, also sold as kiwi berry) and Actinidia kolomikta. They grow outdoors even around Kyiv, and their small smooth-skinned fruits are sweet and aromatic. Buy named varieties: one male plant is needed for several females.
FAQ
How long do kiwi seeds take to germinate?
Usually 1–3 weeks; after cold stratification, faster and more evenly.
Can you grow a fruiting kiwi on a windowsill?
Practically no: fruiting needs lots of space, a cold winter and plants of both sexes.
Love exotic plants? Find out how to grow an avocado from a stone, or choose ready-grown potted plants with UFL delivery in Kyiv.
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Author: Maria Svitlovir
Graduated from Taras Shevchenko National University of Kyiv, Institute of Biology and Medicine (2001). BSc in Biology, MSc in Horticulture. Writes about plants, works at a garden centre selecting and repotting plants, and contributes to plant reference guides.
