If you’ve ever sliced into a juicy, ripe papaya, you know these tropical fruits are packed with little black seeds. Instead of tossing out the seeds, use them to start a papaya plant from seed.
Whether you live in a climate where you can grow papayas outdoors or keep one as a houseplant, this guide includes step-by-step instructions for sprouting papaya seeds as well as simple, practical tips on caring for your new seedlings.
Can You Grow Papayas Indoors?
Papayas thrive in warm climates and are suitable for outdoor growth in USDA Plant Hardiness Zones 9–11. In cooler areas, they’re often cultivated in greenhouses where they are protected and can bear fruit.
For those in cooler climates without a greenhouse, growing papayas indoors is possible. While indoor papayas may not bear fruit, their lush foliage can delight. Keep note, papaya trees can grow over 20 feet tall, so regular pruning is necessary to maintain a compact size indoors.
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Steps for Growing Papaya from Seed
To start growing papayas, collect seeds from a ripe store-bought papaya or purchase them from a reputable seed company. Popular varieties include Hawaiian ‘Solo Sunrise’, Mexican ‘Red Lady’, and Indian ‘Red Matator’.
While papayas are generally easy to grow, these additional planting tips can improve germination rates and seedling success.
What You Need
- Fully ripe papaya
- Knife
- Jar or other small container
- Fine mesh strainer
- Paper towels
- Seed-starting trays or individual planting pots
- Seed-starting mix
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1. Collect Papaya Seeds
Choose a fully ripe papaya, identified by greenish-yellow to golden-yellow skin, and feel slightly soft. Slice it open and scoop out the seeds.
2. Remove the Seed Coat
Fresh papaya seeds have a clear, jelly-like coating that prevents germination from happening too early. Removing this coat improves germination chances.
Soak the seeds overnight in a container of tap water. Then, use a fine mesh strainer to gently rub the seeds, removing the coating. Rinse to wash away any pulp.
3. Let Seeds Dry
If you plan to plant the seeds immediately, there’s no need to dry them. For storage, spread seeds on a paper towel and place them in a warm, dark spot for one to two weeks. Once dry, seal the seeds in labeled and dated paper envelopes and store them in a cool, dark location.
While papaya seeds that were properly stored remain viable for up to 16 months, germination rates decrease with older seeds.
4. Plant Papaya Seeds
Begin by filling seed-starting trays or pots with pre-moistened seed-starting mix. Sow fresh or dried papaya seeds about ¼ inch deep. Germination isn’t guaranteed for all seeds, so drop up to three seeds into each cell.
Place trays or pots in a warm, sunny area and keep the soil moist. Expect germination in roughly two weeks.
In warmer climates, you can directly sow seeds in your garden. Ensure the soil is prepped with compost to support this heavy-feeding plant.
5. Thin Out the Seedlings
Once papaya seedlings stand a few inches tall and have one to two sets of true leaves, remove the weaker plants so that only one seedling remains in each cell.
For fruit production, maintain at least five healthy seedlings. While some papayas self-pollinate, others are either male or female, and both are needed for fruit. More seedlings increase the chances that both male and female plants are present.
6. Transplant the Seedlings
Transplant seedlings when they reach 4 inches tall with at least two sets of true leaves. Handle papaya roots gently and plant at the same depth as in their original container. Learn more about transplanting seedlings for successful growth.
For pot cultivation, select a container with drainage, at least 15 to 20 gallons in size or 18 inches wide, to accommodate growth.
In Zones 9–11, choose a sunny outdoor spot with well-draining soil. Transplant on an overcast, warm day for the best results.
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How to Care for a Papaya Tree
Light
To maximize fruit production, papaya trees need to be exposed to six to eight hours of full direct sunlight daily.
Soil
Whether grown indoors or outdoors, papayas do best in rich, well-draining soil, such as loamy, sandy, or rocky textures. They tolerate a wide pH range from 4.5 to 8.0.
Water
Moisture in the soil should be consistent with regular watering, but avoid sogginess. Good drainage is critical to prevent waterlogging.
Fertilizer
Because papayas are heavy feeders, an application of an organic liquid fertilizer, diluted to half strength, every two to four weeks during the growth phase will provide the nutrients they need.
Temperature and Humidity
In regions below Zone 9, papayas must be brought indoors when temperatures drop below 65°F. During summer, relocate indoor plants outdoors for optimum growth.
The best environment for growth occurs at humidity levels of 60% or higher. Indoors, consider placing plants near a humidifier.
Pests & Diseases
From time to time, check papaya plants over carefully for spider mites, powdery mildew, or other signs of pests, diseases, or stress.
