How To Get Seeds From Alstroemeria – Harvest And Grow Your Own
To harvest Alstroemeria seeds, allow the spent flower heads to develop into large, green, three-sided pods. Wait until these pods turn brown and dry; however, you must cover them with a small mesh bag before they ripen fully.
Alstroemeria pods are “explosive,” meaning they burst open and scatter seeds when touched or fully dry. Once the pods pop inside your bag, collect the dark brown, rounded seeds for immediate sowing or storage.
You likely love Alstroemeria for its incredible vase life and vibrant, orchid-like blooms that brighten any landscape. Buying new potted plants every season can quickly become expensive for a dedicated gardener.
Learning how to get seeds from alstroemeria allows you to expand your garden beds and experiment with new flower variations. This process saves you money while giving you the satisfaction of nurturing a plant from its very beginning.
In this guide, I will walk you through the precise timing for harvest, the trick to catching “explosive” seeds, and how to ensure your collected seeds actually sprout. Let’s dive into the world of Peruvian Lily propagation.
Understanding the Alstroemeria Life Cycle
Alstroemeria, commonly known as the Peruvian Lily, is a hardy perennial that grows from a system of fleshy rhizomes. While most gardeners propagate them by dividing these roots, seed collection offers a different set of rewards.
When you grow from seed, you often get genetic variation. This means the offspring might look slightly different from the parent plant, leading to unique colors or patterns in your garden.
However, you must check your specific cultivar before starting. Many modern, patented “compact” varieties are sterile hybrids, meaning they will not produce viable seeds regardless of your efforts.
Fertile vs. Sterile Varieties
Species types like Alstroemeria aurea or the Ligtu hybrids are prolific seed producers. These varieties are ideal if your goal is naturalizing a large area with drifts of color.
If your plant never develops swollen pods after the flowers fade, it is likely a sterile hybrid. In that case, rhizome division remains your only path for creating new plants for your landscape.
For those with fertile varieties, the process begins the moment the local pollinators—like bees and butterflies—visit your garden. Proper pollination is the essential first step in the seed-making journey.
How to Get Seeds From Alstroemeria: A Step-by-Step Harvesting Guide
Mastering how to get seeds from alstroemeria requires a blend of observation and timing. Unlike many flowers that hold their seeds loosely, the Peruvian Lily is designed to fling them away.
Follow these steps to ensure you capture the seeds before they disappear into your mulch or lawn. Safety is key, so wear gloves if you have sensitive skin, as the sap can occasionally cause contact dermatitis.
Step 1: Identify the Developing Pods
Once the colorful petals fall away, look at the base of the flower. You will see a small, green, triangular structure called the ovary.
If pollination was successful, this structure will begin to swell into a prominent seed pod. Leave these pods on the plant; removing them too early results in “empty” or immature seeds that will not germinate.
Keep the plant well-watered during this phase. High-quality soil with a balanced NPK ratio (such as 10-10-10) helps the plant direct enough energy into seed production.
Step 2: Use the “Bagging” Technique
Alstroemeria pods use a mechanism called ballochory. When the pod dries completely, it builds up internal tension and eventually “explodes,” launching seeds several feet away.
To prevent this, wrap a small organza jewelry bag or a piece of fine mesh around the ripening pods. Secure the bag to the stem with a soft twist-tie or string.
This allows air to circulate so the pod can dry naturally while catching every single seed the moment the pod bursts. Avoid using plastic bags, as they trap moisture and cause the seeds to rot or mold.
Step 3: Monitor for Ripeness
Watch for the pods to change from a fleshy green to a papery brown. You might even hear a faint “pop” when you are working nearby in the garden.
Once you see dark brown seeds sitting at the bottom of your mesh bag, the harvest is complete. Cut the entire stem just below the bag and bring it indoors to a clean workspace.
If the pod is brown but hasn’t popped, you can gently squeeze it. If it is ready, it will shatter easily in your hand, revealing the hard, round seeds inside.
Timing Your Harvest for Maximum Viability
Timing is everything when you are learning how to get seeds from alstroemeria. Harvesting too late means the seeds are gone; harvesting too early means they aren’t “finished.”
In most climates, Alstroemeria blooms in early to mid-summer. Expect your seed pods to reach full maturity about 4 to 6 weeks after the last petals have fallen.
Environmental factors like humidity and temperature play a role. In very hot, dry summers, the pods may ripen faster, so check your “bagged” stems every few days.
Signs of a Mature Seed
A viable Alstroemeria seed should be dark brown or almost black. It should feel hard and gritty, similar to a small peppercorn or a heavy grain of sand.
If the seeds are pale, soft, or green, they are immature. These seeds rarely survive the drying process and almost never sprout when planted in your seed-starting mix.
Discard any seeds that appear shriveled or have small holes in them. Holes are a sign of seed weevils or other pests that have eaten the nutrient-rich center of the seed.
Processing and Cleaning Your Collected Seeds
Once you have gathered your seeds from the mesh bags, you need to clean them. Removing chaff (the leftover pod bits) is vital for preventing fungal growth during storage.
Spread the contents of your bags onto a white paper plate or a piece of parchment paper. Use a pair of tweezers to pick out the large pieces of dried pod and stem.
For smaller debris, you can gently blow across the plate. The lighter chaff will move away, leaving the heavy, healthy seeds behind on the surface.
The Water Test for Viability
If you aren’t sure if your seeds are “good,” try the float test. Place your cleaned seeds in a small bowl of room-temperature water for a few minutes.
Generally, seeds that sink to the bottom are dense and full of life. Seeds that float are often “duds” that lack an embryo and are unlikely to grow into healthy plants.
Dry the “sinkers” immediately on a paper towel. Do not leave them in the water for more than an hour unless you are planning to sow them immediately.
How to Store Alstroemeria Seeds Correctly
If you aren’t planting your seeds right away, storage conditions will determine their future success. Improper storage leads to premature germination or total loss of viability.
Ensure the seeds are bone-dry before putting them away. Any lingering moisture trapped in a container will encourage Botrytis or other fungal pathogens to destroy your harvest.
Place the seeds in a small paper envelope rather than a plastic bag. Paper allows the seeds to “breathe” and ensures any microscopic moisture can escape.
Creating the Ideal Environment
Store your envelopes in a cool, dark, and dry location. A climate-controlled pantry or a dedicated drawer in your potting shed works perfectly for this purpose.
Label the envelope clearly with the variety name and the date of harvest. Most Alstroemeria seeds remain highly viable for 1 to 2 years, but their germination rate drops significantly after that.
For long-term storage, some professional landscapers use a refrigerator. If you do this, place the paper envelope inside a sealed glass jar with a silica gel packet to keep the humidity near zero.
From Seed to Sprout: Germination Strategies
Knowing how to get seeds from alstroemeria is only half the battle; you also have to get them to grow. Alstroemeria seeds have a reputation for being somewhat “fickle” or stubborn.
This is because many species have a built-in dormancy mechanism. In nature, this prevents the seed from sprouting during a random warm spell in winter, only to be killed by a freeze later.
To overcome this, you may need to mimic the changing seasons through a process called stratification. This signals to the seed that winter has passed and it is safe to grow.
The Warm-Cold-Warm Method
Many experienced gardeners use a specific temperature cycle for Peruvian Lilies. First, soak the seeds in warm water for 24 hours to soften the seed coat.
Next, sow them in a moist seed-starting mix and keep them at room temperature (about 70°F) for 3 weeks. After that, move the entire tray to a refrigerator for 3 to 6 weeks.
Finally, bring the tray back into a warm, bright area. This “fake winter” often triggers a much higher germination rate than simply sticking the seeds in the dirt.
Soil and Light Requirements
Use a well-draining, sterile seed-starting mix. Avoid heavy garden soil, which can compact around the delicate roots and lead to “damping off,” a common seedling disease.
Plant the seeds about ¼ inch deep. They do not require light to germinate, but once the first green shoots appear, they need 12 to 14 hours of bright, indirect light daily.
Keep the soil consistently moist but never waterlogged. Using a spray bottle to mist the surface is safer than pouring water, which can dislodge the tiny seedlings.
Common Pitfalls and Pro Tips
Even for seasoned landscapers, how to get seeds from alstroemeria can involve some trial and error. One common mistake is neglecting the “explosive” nature of the pods.
If you don’t use mesh bags, you will likely find Alstroemeria “weeds” popping up in your gravel paths or nearby pots next spring. While beautiful, they can become invasive in certain climates.
Another tip: don’t be discouraged if germination is slow. Some seeds may sprout in 14 days, while others from the same pod might take three months. Patience is your best tool.
Fertilizing Young Seedlings
Wait until your seedlings have at least two sets of “true leaves” before feeding them. Use a water-soluble fertilizer diluted to half-strength to avoid burning the tender roots.
Focus on a formula that encourages root development, often indicated by a higher middle number in the NPK ratio (Phosphorus). Strong roots now mean drought-tolerant plants later.
Once the seedlings are 3-4 inches tall, start “hardening them off” by exposing them to outdoor conditions for a few hours each day. This prevents transplant shock when they move to the garden.
Frequently Asked Questions
Can I Grow Alstroemeria From Store-Bought Cut Flowers?
Generally, no. Most cut flowers are harvested before the seed pods have any chance to develop. Additionally, many florist varieties are sterile hybrids designed for bloom size rather than reproduction.
How Long Does It Take for a Seed-Grown Plant to Bloom?
It typically takes one to two years for an Alstroemeria grown from seed to produce its first flowers. The plant spends its first year focusing on building a robust rhizome system underground.
Why Are My Seed Pods Falling Off Before They Turn Brown?
This is often caused by extreme heat stress or inconsistent watering. If the plant feels threatened by drought, it may abort its seeds to save its own life. Ensure consistent moisture during the pod-ripening phase.
Do I Need to Nick the Seeds With a Knife?
While some gardeners use scarification (nicking the seed coat), it is usually unnecessary for Alstroemeria if you use the warm-water soak and stratification method. Nicking can actually damage the internal embryo if not done perfectly.
Conclusion: Growing Your Legacy
Mastering how to get seeds from alstroemeria is a rewarding skill that connects you deeper to the rhythm of your garden. By observing the pods, bagging them in time, and managing the germination process, you can create a sustainable supply of these stunning perennials.
Remember that gardening is an experiment. Some years your seed harvest will be massive, and other years the weather might make things difficult. Each season provides a new opportunity to refine your technique.
Now that you have the knowledge, head out to your garden and look for those swelling green ovaries. Start your collection today, and soon you will have drifts of Peruvian Lilies that you raised entirely by hand.
Taylor pairs an engineer's eye with years of hands-on work in soil, lawns and outdoor machinery. He tests ideas in his own garden, keeps tractors and mowers running himself, and speaks to local horticulture groups. Every Garden Aider guide is written to be practical, accurate and safe to follow.
“To bring life alive, you just need to mix some love with the compost, bedding, and gardening machines.”