How to Grow Rare Moonseed Plants

How to Grow Rare Moonseed Plants


Moonseed plants are a unique and rare type of flowering vine native to tropical regions around the world. Their name comes from their stunning seeds that resemble a crescent moon. While often overlooked, moonseeds have a lot to offer any gardener looking to grow an unusual plant.

In this comprehensive guide, I will walk through everything you need to know about successfully cultivating moonseeds. We’ll cover proper care, propagation, common pests and diseases, and tips for helping your moonseed thrive. With just a bit of effort, you can have these exotic vines growing in your own backyard!

Selecting the Right Moonseed Species

There are around 20 known species of moonseed, with most hailing from Central and South America. Here are some of the most popular types you may want to grow:

Anamirta cocculus

This species is native to India and grows well in warm, humid environments. It produces small greenish-white flowers and cherry-sized red fruit. The seeds are especially crescent-shaped.

Argyreia nervosa

Also called the Hawaiian baby woodrose, this moonseed is found across the Pacific Islands. Its hallmark feature is large, purple morning glory-like flowers. It is a popular ornamental vine but can be tricky to cultivate outside its native region.

Ipomoea alba

Sometimes called the moonvine, this type offers huge, white trumpet-shaped blooms that unfurl in the evening. As a night bloomer, it is famously fragrant after sunset. Grow it in any warm climate with full sun exposure.

Maripa scandens

Hailing from the Amazon basin, this vigorous climber shows off white flowers streaked with purple. Its heart-shaped leaves add lush greenery through the growing season. Rich, well-draining soil helps it thrive.

Caring for Moonseed Vines

While their needs vary slightly by species, most moonseeds share some core growing requirements. Here are some top tips for giving them a healthy start:

Site Selection

Moonseeds demand warm temperatures and humid conditions. In most regions, they can only be grown as annuals during the frost-free seasons. Select a sheltered, sunny spot protected from wind.

Soil Needs

These tropical vines like nutrient-rich, well-draining soil. Amend with compost or manure before planting. A pH between 6-7 is ideal for most varieties.


Keep the soil consistently moist but not soggy. Allow it to partly dry out between deep waterings. Consider using drip irrigation or soaker hoses to maintain optimal moisture.

Support Structures

Being climbers, moonseeds need strong supports to scramble up. Provide trellises, arbors, fences or poles spaced 1-2 feet apart. Avoid thin stakes that can bend under their weight.


Apply balanced liquid fertilizer every 2-3 weeks during the growing season. This keeps moonseeds well fed and encourages plentiful flowers.

Propagating Moonseed Plants

Getting moonseed vines started from seed can be challenging. Here are some techniques to try:

Start Seeds Indoors

Sow fresh seeds indoors 8-12 weeks before your last expected frost. Use small pots with seed starting mix and keep the soil evenly moist. Germination takes 1-2 months.

Scarify Seeds

To speed germination, lightly scratch or nick the seed coat with sandpaper before planting. This allows moisture to penetrate more easily.

Take Stem Cuttings

Cut 4-6 inch stem tip cuttings from an existing plant in spring. Remove the leaves from the bottom half, dip in rooting hormone, and plant in sterile media. Keep humid until new growth emerges.

Divide Root Balls

Carefully dig up an established moonseed in early spring, keeping the root system intact. Gently pull apart into smaller sections, replanting each with some roots and shoots. Water well until it recovers.

Common Moonseed Pests and Diseases

When growing an unusual plant, it helps to be aware of potential problems to watch for. Here are some common moonseed afflictions:


Tiny sap-sucking insects that cluster on stems and leaves. Control with horticultural oil or insecticidal soap sprays.


Fluffy white bugs that leave sticky residue on foliage. Remove manually or use neem oil applications.

Powdery Mildew

A white fungal coating that spreads across leaves in humid weather. Improve air circulation and use sulfur sprays to treat.

Root Rot

Caused by overwatering, this fungal issue makes roots dark and mushy. Let soil dry out between waterings and discard affected plants.

Spider Mites

Tiny pests that form webs on the undersides of leaves. Knock off with a strong spray of water or introduce predatory mites.

Tips for Growing Healthy Moonseed Vines

Giving your moonseeds attentive care will keep them looking their best. Here are some handy growing tips:

  • Pinch off vine tips to encourage bushier growth.

  • Install a humidity tray filled with pebbles to boost moisture.

  • Apply mulch around the base to suppress weeds and retain soil moisture.

  • Provide a strong trellis, arbor or fence for the vines to climb each year.

  • Bring potted moonseeds indoors before the first frost. Those in ground will need to be replaced annually.

  • Prune back any damaged or diseased growth to keep it from spreading.

  • Rotate moonseeds to a new location each year to prevent disease buildup in soil.

Final Thoughts

With their exotic flowers and crescent moon seeds, these unusual vines make a fabulous addition to any garden. By selecting suitable varieties, providing optimal care and keeping a watch for pests, you can successfully grow moonseeds in your own backyard. It takes some effort, but the rewards of these rare beauties are well worth it!

If you follow the guidance in this guide, you’ll be able to get your moonseed vines off to a great start. Be sure to make adjustments as needed based on your specific climate and growing conditions. With a little luck, you’ll soon have these unusual climbers growing strong.