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Harvesting & Growing Gympie Gympie Seeds: How To Guide

Do you wish to know how to grow Gympie Gympie seeds that are effective in keeping predators away?

Gympie-Gympie or Gympie Stinger seeds grow well in well-draining soil, maintained moisture, warm temperature, and indirect sunlight; they can sprout within 2-3 months and reach up to 16 feet tall until maturity.

Remember, these stinger seeds are challenging to grow away from their native regions (Australia and Asia), requiring intense primary care.

Use this guide to learn more about ways to obtain and grow Gympie Gympie seeds.

What Do Gympie Gympie Seeds Look Like?

In many parts of Australia and Asia, Gympie Gympie (Dendrocnide moroides) protects against large animals.

Also known as Gympie Stinger or the Stinging tree, the tree is infamous for its incredibly painful stinging sensation that it leaves upon contact with the skin.

However, despite their stinging, they have been quite popular as garden trees, where many gardeners prefer growing them out of seeds.

gympie gympie flower outside
If you are wondering, the word Gympie Gympie comes from the Aboriginal word -gimpi gimpie, meaning stinging.

If you are one of them, you should start with identifying the seeds for propagation.

The appearance, size, and weight of Gympie Gympie seeds may vary.

ColorVaries (typically brown/black)
FlowersPink to light-purple flowers
Flowering SeasonSummer
Pollination to Seed Maturity3-4 weeks
Time of Seed HarvestAfter flowering season
Germination TimeWeeks to months
Sowing TimeWarmer months

The plant produces small, greenish flowers that eventually swell up to become fruits, where each fruit holds a single hard seed.

In the wild, the birds often pick up the seeds and drop them on the ground, creating new vegetation.

If accessible, you can harvest these fruits to obtain young seeds for propagation.

How to Harvest Gympie Stinger Seeds?

Be careful about harvesting Gympie stinger seeds because touching the leaves, stems, and fruits with the naked hand can send an intense stinging sensation.

Wear protective gardening gloves and cover your body, preferably with protective gear, to prevent stings.

Like any seeding flower, the process begins with pollination in spring. You should wait at least 2-3 weeks to see the flowers.

The best time to obtain Gympie seeds is mid or late summer when the flowers have matured into a fruit shape. You could notice white or purple-red fruit hanging by the stems.

Steps to Harvest and Store the Gympie Seeds

Here are the steps to harvest and store their seeds.

  • Wear thick protective clothing, gloves, and eye protection to avoid stinging hairs (long sleeves, pants, and closed shoes are recommended).
  • Using a pruning shear or scissor, carefully cut or snip the fruits.
gympie gympie flowers
Carefully cut the fruit-turned flowers using a sharp object to avoid stinging.
  • Place the harvested seed pods into a container or bag for processing later.
  • Once collected, you can use scissors or sharp objects to open the fruit and extract the seed, still wearing gloves.
  • Avoid touching the inner parts of the fruits to prevent contact with stinging hairs.
  • Otherwise, gently tap or shake the fruits to encourage the seeds to fall out.
  • Remove debris or hair by running the seeds through water on a fine-mesh sieve or strainer.
  • Pat the seeds dry with a clean paper towel and allow them to dry.

Consider storing these seeds well if you wish to use the seeds next year.

  • Place the dried seeds in a small, airtight container, for example, a Ziploc bag.
  • Find a cool, dry, and dark place to store the seeds.
  • Strictly avoid direct sunlight, heat, and humidity to prevent damage.
  • Label the seed container with the harvest date and any other relevant information if necessary.

Gympie Gympie Seeds for Sale

If you have access to Gympie Gympie plants in your area, you can try collecting them in the summer.

Consider saving yourself from the hassle of ordering quality seeds online.

Remember, Gympie is not so common in the US, requiring ordering seeds or plants from Australian sellers, such as Herbalistics.

It may be easier to find Gympie Gympie seeds if you reside in Australia or nearby countries.

Can you Grow Gympie Stinger from Seed?

Gympie trees are wild shrubs that require a suitable environment to grow.

Therefore, growing them in inhospitable or unsuitable environments may bear poor results.

Moreover, it is crucial to adhere to local laws and regulations regarding collecting and propagating native plant species outside their habitat.

Steps to Propagate Gympie Seeds

Here is the step-by-step guide to propagating Gympie stinger seeds.

1. Prepare the Seeds

  • Gympie-Gympie seeds have a hard outer coat that can slow germination.
  • Consider nicking the seed coat by soaking it in warm water for a few hours before planting like you would for Hosta seeds.
  • Better soak in 1-5% Sodium Hypochlorite solution for a minute to increase the chances of germination.

2. Preparing the Soil

  • Regular potting soil will do for sowing Gympie Gympie seeds, but remember to loosen up the dirt by adding perlite.
  • Otherwise, you can buy a premixed soil containing coco peat, perlite, compost, and charcoal.

3. Sowing Seeds

  • Fill small pots, cups, or glass with the prepared soil.
  • Use one seed per pot and insert it at a shallow depth in the potting mix.
  • If using a single tray, keep spacing between each seed to allow growth.
  • Cover the planter with plastic wrap to maintain humidity and warmness.

4. Temperature and Moisture

  • Leaving the seeds outside is a bad idea as the temperature keeps fluctuating.
  • Consider placing the seeds under an LED grow light, ensuring the temperature stays at all times at around 75 °F (23.8°C).
  • Similarly, moisten the soil regularly (every few days) to maintain even soil moisture.

5. Transplanting the Seedlings

  • The seeds should sprout in 4-8 weeks, so be patient.
  • Once germinated, seedlings will develop a couple of true leaves.
  • You can continue growing them in the same pot or move to a bigger pot for significant root growth.

Consider moving the sapling to outdoor soil when the weather is warm, preferably in early summer.

They prefer tropical habitats typical to rainforests with partial shade and enough humidity. Choose a location with early sunlight and ample shade.

Tips to Care for Gympie Stinger after Germination

As previously mentioned, growing Gympie stinger outside its native habitat will not be easy.

Therefore, consider providing them with enough care until they are well-established and prepared to fend for themselves.

gympie gympie seeds stinging
Beware, as all part of Gympie Gympie tree contains stinging prickles, which can send a painful stinging sensation.

Here are some pointers to take care of Gympie Gympie after germination.

  • Sunlight: Provide bright, indirect sunlight to encourage healthy growth. Moreover, avoid direct sunlight, especially during the seedlings’ early stages.
  • Temperature: Maintain a warm environment around your plant, preferably with temperatures around 77-86°F (25-30°C).
  • Humidity: These tropical plants love a humid environment, which you can achieve by using a humidity dome, misting the seedlings regularly, or placing the pots in a tray with water.
  • Watering: Keep the soil moist and avoid waterlogged conditions. Watering once 7-10 days would suffice.
  • Fertilization: They are not heavy feeders; hence, fertilize once or twice in a growing season with a diluted, balanced liquid fertilizer.
  • Acclimatization: When moving outdoors, gradually acclimatize the seedlings to lower humidity and increased light levels over a week or more to adjust to changing conditions.
  • Pruning: If necessary, cut away any damaged or yellowing leaves, but wear protective gloves when handling the plant and dispose of the cutting by burying them in the ground.
  • Pests and Diseases: Regularly inspect the saplings for signs or symptoms of pests and diseases and treat them promptly with appropriate methods to prevent damage.
  • Environmental Impact: If you’re considering planting Gympie-Gympie outdoors, research and evaluate the potential environmental impact in your state.

Gympie-Gympie seedlings grow slowly, so be patient and provide consistent care for optimal development.

From Editorial Team


Gympie Gympie is not a plant to mess with because almost every part of the tree will send a painful stinging sensation, which can last for hours.

Remember to keep your children and pets away from the plant, or consider planting these trees away from their reach.

They would look adorable as ornamental plants kept in the enclosed corner of the garden, away from human and animals’ reach.