Sandersonia

Sandersonia aurantiaca, the golden lily of the valley, produces lantern-shaped orange blooms that excel as cut flowers. If you have never heard of sandersonia, you are in for a treat. This South African native is a showstopper in the garden and in a vase.

People often ask if it is difficult to grow. The truth is, it has specific needs, but once you understand them, it is very rewarding. Let’s walk through everything you need to know about planting, caring for, and harvesting this unique plant.

Understanding The Sandersonia Plant

Before you buy bulbs, it helps to know what you are dealing with. This plant is not a true lily, despite the common name. It belongs to the Colchicaceae family, which makes it a relative of the autumn crocus.

It is a tuberous perennial. This means it dies back in winter and stores energy in a underground tuber. The growth cycle is specific to its native climate, which features wet winters and dry summers.

Key Characteristics To Know

Height: Usually grows 24 to 30 inches tall.
Foliage: Thin, climbing leaves that need support.
Blooms: Bell-shaped, lantern-like flowers that hang downwards.
Color: Vivid orange to golden yellow, sometimes with a green tip.
Lifespan: Perennial in warm zones, but often treated as an annual in cooler areas.

The flowers are not just pretty. They have a long vase life, often lasting up to two weeks. This is why florists love them for bridal bouquets and high-end arrangements.

One thing to note: all parts of the plant are toxic if ingested. Keep it away from pets and children who might nibble on things.

Now we get to the core of growing this beauty. The secret to success lies in mimicking its natural habitat. It comes from the Drakensberg mountains, so it likes cool roots and a distinct dry period after flowering.

You cannot just toss the tubers in the ground and forget them. They need specific conditions to thrive and multiply. Here is a breakdown of the essential requirements.

Light And Temperature Requirements

In the wild, this plant grows in grasslands where it gets full sun in spring but is shaded by taller plants later. In your garden, aim for full morning sun with some afternoon shade. This is especially critical in hot climates.

They are not frost hardy. If you live in USDA zones 8-10, you can leave them in the ground year-round. In colder zones, you must dig up the tubers and store them indoors for winter.

Ideal growing temperatures are between 60°F and 75°F. If it gets too hot, the plants will stop blooming. If it is too cold, growth will be stunted.

Soil Preparation Is Critical

This is where most people fail. Sandersonia hates heavy, wet soil. It needs sharp drainage to prevent the tubers from rotting.

You should amend your soil with plenty of coarse sand or perlite. A mix of 50% garden soil and 50% grit is a good starting point. The pH should be slightly acidic to neutral, around 6.0 to 7.0.

If you are growing in pots, use a gritty, well-draining compost. Terracotta pots are ideal because they allow excess moisture to evaporate.

Planting Sandersonia Tubers

Timing is everything. Plant the tubers in early spring, after the danger of frost has passed. The soil temperature should be at least 55°F.

If you start them indoors, you can get a head start. Plant them in pots about 8 weeks before the last expected frost. This will give you earlier blooms.

Step-By-Step Planting Guide

Soak the tubers in lukewarm water for 24 hours before planting. This rehydrates them.
Dig a hole or trench that is 2 to 3 inches deep.
Place the tuber with the “eyes” facing upwards. Look for small pink buds.
Space them 6 to 8 inches apart to allow for airflow.
Cover with soil and water in well. Do not water again until shoots appear.

Do not overwater at this stage. The tubers will rot if they sit in wet soil before they have sprouted. Patience is key here.

Once the shoots are about 4 inches tall, you need to provide support. They are twining climbers and will flop over without something to grab onto.

Support Options

Pea netting stretched horizontally.
Thin bamboo canes inserted into the pot.
Wire mesh cylinders for a neat look.
Neighboring plants that offer a sturdy structure.

Guide the young tendrils towards the support. They will wrap themselves around it naturally. This keeps the stems straight and the flowers facing upwards.

Watering And Feeding Schedule

Once the plant is actively growing, you need to switch your watering habits. From spring through flowering, keep the soil consistently moist. Do not let it dry out completely.

However, you must also avoid waterlogging. The goal is a moist sponge, not a swamp. Check the top inch of soil daily during hot weather.

Feeding is also important for flower production. Use a high-potassium fertilizer once the buds start to form. This encourages more blooms and stronger stems.

Fertilizer Routine

Start with a balanced fertilizer (10-10-10) when shoots appear.
Switch to a tomato fertilizer (high potash) when buds form.
Feed every two weeks during the growing season.
Stop feeding completely once the flowers fade.

Do not use high-nitrogen fertilizer. This will give you lots of leaves but very few flowers. The plant needs phosphorus and potassium for blooming.

Harvesting And Vase Life

If you are growing these for cut flowers, you need to know when to cut them. Harvest when the first flower on the stem is fully open. The smaller buds will continue to open in the vase.

Use sharp, clean shears to make a cut at the base of the stem. Immediately place the stems in cool water. Do not leave them lying in the sun.

To maximize vase life, condition the stems properly. This involves a few simple steps that make a big difference.

How To Make Them Last Longer

Recut the stems at a 45-degree angle under water.
Remove all leaves that will sit below the waterline.
Use a clean vase with fresh water and flower food.
Keep them away from direct sunlight and fruit bowls.
Change the water every two days.

With this care, they can last 14 to 16 days. That is exceptional for a cut flower. The color also deepens as they age, which adds to their charm.

One tip: the sap can be irritating to skin. Wear gloves when handling the stems if you have sensitive skin.

Overwintering And Storage

In colder climates, you cannot leave the tubers in the ground. You must lift them and store them. This is not hard, but it must be done correctly.

Wait until the foliage has died back completely. This usually happens in late autumn. The plant needs this time to build up energy for next year.

Lifting And Storing Steps

Cut back the dead foliage to about 2 inches above the soil.
Carefully dig up the tubers with a fork. Do not stab them.
Shake off the excess soil, but do not wash them.
Let them dry in a warm, airy place for a week.
Store them in a box with dry peat moss or vermiculite.
Keep them at 50°F to 60°F in a dark, dry place.

Check on them monthly. Discard any that have turned mushy or moldy. Healthy tubers should feel firm and heavy.

Do not be alarmed if the tuber shrinks slightly. That is normal. They will plump up again when you soak them in spring.

Common Problems And Pests

This plant is relatively pest-free, but it is not immune. The most common issue is botrytis, a fungal disease that thrives in humid, wet conditions.

Good airflow is your best defense. Do not crowd the plants. Water at the base, not over the leaves.

Pests To Watch For

Aphids: They suck sap and spread viruses. Blast them off with water.
Spider mites: They cause stippling on leaves. Increase humidity to deter them.
Slugs and snails: They will eat young shoots. Use organic pellets.

If you see yellowing leaves, it is often a watering issue. Either too much or too little. Check the soil moisture before you adjust anything.

Root rot is the biggest killer. If the tubers feel soft, they are likely rotting. This is almost always caused by poor drainage or overwatering.

Using Sandersonia In Floral Design

These flowers are a florist’s dream. The unique shape adds texture and interest to any arrangement. They pair beautifully with roses, lisianthus, and trailing ivy.

Because they are relatively expensive, they are often used as a focal flower. A single stem can elevate a simple bouquet. They also work well in boutonnieres and corsages.

The orange color is vibrant. It stands out against white and green. For a softer look, combine them with cream-colored blooms and dusty miller.

Design Tips

Use them in hand-tied bouquets for a wildflower look.
Pair with blue delphinium for a color contrast.
Let them trail over the edge of a low vase.
Combine with dried grasses for a rustic feel.

They also dry well if hung upside down. The color fades slightly, but the shape remains. This makes them great for everlasting arrangements.

Frequently Asked Questions

Is sandersonia a true lily?
No, it is not. It belongs to the Colchicaceae family, which is different from true lilies (Liliaceae). The common name is misleading.

Can I grow sandersonia in a container?
Yes, absolutely. In fact, containers are often better because you can control the drainage and move the pots to protect them from cold or heat.

Why are my sandersonia leaves turning yellow?
This is usually a watering issue. Overwatering is the most common cause, but underwatering can also cause it. Check the soil and adjust your schedule.

How long does it take for tubers to sprout?
It can take 3 to 6 weeks for shoots to appear. Do not give up if you do not see growth immediately. They are slow to wake up.

Can I leave the tubers in the ground all year?
Only if you live in a frost-free zone (USDA 8-10). In colder areas, the tubers will freeze and die if left in the ground.

Final Thoughts On Growing Success

Growing sandersonia is not difficult, but it does require attention to detail. The main things to remember are excellent drainage, cool roots, and a dry rest period.

Start with quality tubers from a reputable nursery. Cheap tubers are often old or damaged. A good start makes all the difference.

Do not be discouraged if you do not get a huge harvest the first year. The plants need time to establish. They will multiply and produce more stems each year.

Once you see those glowing orange lanterns in your garden, you will understand why they are so prized. The effort is worth it. Add them to your cutting garden and enjoy the compliments.

Remember to mark your calendar for lifting them in autumn. This is the step that most people forget. Consistent care will reward you with years of beautiful blooms.

So go ahead and try it. You have all the information you need. Get your tubers, prepare the soil, and plant with confidence. Your garden will thank you.