Introduction
There is nothing quite like the first sight of a tulip peeking through the soil after a long winter. Those bright pops of color are a rewarding sign that spring has finally arrived. At Longfield Gardens, we want every gardener to experience that same joy year after year. While many people treat tulips as annuals, you can often enjoy a second or even third season of flowers by giving the bulbs a little extra care during their summer dormancy.
Knowing how to store tulip bulbs over summer is a simple way to keep your garden looking its best. This process involves lifting the bulbs from the ground once they finish blooming, cleaning them, and keeping them in a controlled environment until it is time to plant again in the fall. This guide will walk you through the timing, cleaning, and storage steps needed to protect your investment and encourage healthy blooms next spring. By following these steps, you can ensure your bulbs stay firm, healthy, and ready for another round of beautiful color.
Why You Should Consider Storing Tulip Bulbs
In many parts of the country, tulips are perfectly happy staying in the ground all year. However, there are several practical reasons why lifting and storing them over the summer can lead to better results. This extra step is especially helpful if your garden conditions aren't a perfect match for what tulips need during their "off-season."
Preventing Bulb Rot
Tulips are native to regions with cold winters and very dry summers. In many American gardens, summer is a time of frequent rain or regular irrigation for lawns and nearby perennials. If tulip bulbs sit in wet, warm soil during their dormant period, they are highly susceptible to rot. Lifting them and keeping them in a dry spot is a simple way to keep them safe from excess moisture.
Freeing Up Garden Space
Many gardeners have limited space and want to keep their flower beds looking full and vibrant all summer long. Once tulips finish blooming, their foliage takes several weeks to turn yellow and die back. During this time, the area can look a bit untidy. By digging up the bulbs, you clear the way for summer annuals like zinnias, marigolds, or petunias. This allows you to maximize your garden's beauty without worrying about accidentally digging into your dormant bulbs later in the season.
Managing Soil Quality and Pests
If you have heavy clay soil, it can become very compacted over the summer. This makes it difficult for delicate bulbs to breathe or expand. Lifting the bulbs gives you a chance to amend the soil with compost or organic matter before you replant in the fall. Additionally, storing bulbs indoors protects them from hungry squirrels or voles that might find them an easy snack during the summer months.
Key Takeaway: Storing bulbs protects them from rot caused by summer rain and clears space for new summer flowers.
When to Dig Up Tulip Bulbs
Timing is everything when it comes to harvesting bulbs. If you dig them up too early, the bulb won't have enough energy to produce a flower next year. If you wait too long, the foliage might disappear entirely, making it hard to find where the bulbs are buried.
The Role of Photosynthesis
After the tulip flower fades, the plant begins its most important job: recharging the bulb. The green leaves act like solar panels, collecting energy from the sun and storing it in the bulb for next spring. This process is essential for the development of the flower bud inside the bulb.
Wait until the foliage has turned yellow or light brown and has a "papery" feel. This usually happens about six to eight weeks after the plant has finished blooming. When the leaves pull away easily from the bulb with a gentle tug, you know the plant is finished with its work for the year.
Deadheading for Energy
To help the bulb focus all its energy on storage rather than seed production, you should "deadhead" the tulips as soon as the petals fall. Simply snip off the very top of the green flower stalk where the bloom was attached. Leave the rest of the stem and all the leaves intact until they turn brown. This simple step ensures the bulb gets every bit of nutrients possible before it goes into dormancy.
What to Do Next:
- Remove the spent flower heads immediately after they fade.
- Leave all green foliage alone so it can collect sunlight.
- Mark the spot with a small stake so you remember where to dig later.
- Wait for the leaves to turn yellow and limp before lifting.
How to Lift Bulbs Safely
When the foliage is ready, it is time to bring the bulbs out of the ground. You want to be gentle during this process to avoid nicking or bruising the bulbs, as any damage can invite disease during storage.
Using the Right Tools
A hand trowel is great for small groups of bulbs, but a garden fork is often the better choice for larger drifts. A fork allows you to loosen the soil from underneath and lift the bulbs upward without the sharp edge of a shovel cutting through them.
The Digging Process
Start digging several inches away from where the stems enter the ground. This gives you a "safety zone" so you don't hit the bulbs directly. Dig down about 6 to 8 inches, which is the standard planting depth for most tulips. For a deeper dive into that spacing, see How Deep Do You Plant Tulip Bulbs?. Gently pry the soil upward and use your hands to sift through the loose earth to find the bulbs.
As you lift them, you may notice small "daughter" bulbs or offsets attached to the main bulb. These are new bulbs the plant has produced. You can keep these, though they may take a year or two of growth before they are large enough to produce their own flowers.
Cleaning and Sorting Your Bulbs
Once the bulbs are out of the ground, they need a little bit of grooming before they head into storage. Proper cleaning helps prevent mold and allows you to inspect the health of your collection.
Removing Soil and Foliage
Gently shake the bulbs to remove large clumps of dirt. Use your fingers to brush away any remaining soil, but do not wash them with water. Introducing moisture at this stage can lead to fungal issues. If the soil is very wet, let the bulbs sit in a shaded, breezy spot for an hour or two until the dirt dries and falls off easily.
If the foliage is completely dry and brown, it should snap off easily from the top of the bulb. If it still feels "attached" or fleshy, use a pair of clean garden snips to cut the stem about an inch above the bulb.
The Touch Test
Before you put anything into storage, you should perform a quick health check. A healthy tulip bulb should feel heavy for its size and be firm to the touch, much like a fresh onion.
Discard any bulbs that:
- Feel mushy or soft when squeezed.
- Have visible patches of blue or green mold.
- Feel extremely light or hollow (this usually means the bulb has dried out completely).
- Show signs of significant physical damage or deep gashes.
Key Takeaway: Only store bulbs that are firm, dry, and free of mold to ensure they survive the summer months.
The Curing Process
Curing is a fancy word for letting the bulbs dry out completely before they are tucked away. This step is vital because it toughens the outer skin of the bulb, creating a protective barrier against the environment.
Finding the Right Spot
Place your cleaned bulbs in a single layer in a shallow box or on a mesh screen. Choose a spot that is out of direct sunlight but has excellent air circulation. A covered porch, a shaded garage, or a garden shed are all good options. Avoid placing them in a dark, damp basement at this stage, as they need a breeze to dry properly.
Duration of Curing
Let the bulbs sit for about three to five days. During this time, the outer "tunic"—the brown, papery skin—will become more defined. This skin helps regulate the moisture levels inside the bulb while it sleeps. After a few days, the bulbs should feel dry to the touch and be ready for their final storage location.
Creating the Ideal Storage Environment
Now that your bulbs are cured, they need a home for the next few months. The goal is to mimic the dry, cool conditions of their native habitat.
Temperature and Humidity
Tulips prefer a storage temperature between 60°F and 70°F. While they can handle slightly warmer temperatures, they should never be kept in a spot that gets hot, such as an unventilated attic or a sunny windowsill. High heat can kill the flower bud forming inside the bulb.
Humidity should be low. A dry environment prevents the growth of mold and rot. If you live in an extremely humid climate, you might consider keeping your bulbs in a room with a dehumidifier or air conditioning.
Airflow and Ventilation
Never store tulip bulbs in sealed plastic bags or airtight containers. Without oxygen, the bulbs will "suffocate" and rot. Instead, use breathable containers such as:
- Mesh or net bags (like the ones used for onions or oranges).
- Paper lunch bags with a few holes punched in the sides.
- Cardboard boxes lined with newspaper.
- Old nylon stockings.
If you are using a box, make sure the bulbs aren't piled too deep. A single or double layer is best to ensure every bulb gets enough air.
Darkness
Bulbs are meant to be underground, so they prefer a dark environment during dormancy. Keep your storage containers in a dark corner of a closet, a basement shelf, or a pantry. Exposure to light can sometimes trigger the bulb to start growing prematurely.
Protecting Bulbs from Pests During Storage
Even though your bulbs are indoors, they may still be at risk. Mice and rats find tulip bulbs to be a delicious treat, and they can sniff them out from a distance.
If you are storing your bulbs in a garage or shed, consider hanging the mesh bags from the rafters. This keeps them out of reach of scurrying rodents. If you must store them on a shelf, you can place the breathable bags inside a plastic crate with small ventilation holes or a wire mesh cage. This allows for airflow while providing a physical barrier against pests.
To Store or Not to Store?
Not all tulips are created equal. Some varieties are naturally better at returning year after year, while others are best treated as one-time shows. Knowing which type you have can help you decide if lifting and storing is worth the effort.
Perennial-Leaning Tulips
Some varieties are known for their ability to "perennialize," meaning they come back for several years with consistent vigor. These are the best candidates for summer storage.
- Darwin Hybrid Tulips: These are the superstars of the tulip world. They are tall, strong, and very reliable.
- Fosteriana Tulips: Also known as Emperor tulips, these have large blooms and tend to be very hardy.
- Species Tulips: These are smaller, "wild" types of tulips. They often do best if left in the ground in a rock garden, but they can also be stored if your soil is too wet.
Single-Season Tulips
Highly bred varieties, such as some of the very fancy double-fringed or parrot tulips, often lose their vigor after the first year. They may return with only leaves and no flowers, or the flowers may be much smaller. While you can certainly try to store them, we often recommend starting with fresh bulbs in the fall for these specific types to ensure a high-impact display. For gardeners who prefer fuller blooms, double late tulips are another dramatic option.
Replanting Your Stored Bulbs
The storage journey ends in the fall, usually between September and November depending on where you live. You want to wait until the soil has cooled down before putting the bulbs back into the ground.
Choosing the Right Time
A good rule of thumb is to plant your tulips when the evening temperatures are consistently between 40°F and 50°F. In most regions, this happens after the first frost but before the ground freezes solid. We time our shipping schedule at Longfield Gardens to ensure bulbs arrive at the right planting time for your specific climate zone.
Preparing the Site
When you are ready to replant, choose a sunny spot with well-draining soil. Dig your holes about 6 to 8 inches deep. This depth is important because it protects the bulbs from temperature swings and keeps them out of reach of some pests. Place the bulbs in the hole with the "pointy" side facing up. If you can't tell which side is the top, plant it on its side; the sprout will naturally find its way toward the light.
Summary of the Process:
- Wait for foliage to turn yellow/brown.
- Gently lift bulbs with a garden fork.
- Clean off soil and remove dead leaves.
- Cure in a shaded, airy spot for 3–5 days.
- Store in breathable bags in a cool, dark, dry place.
- Replant in late fall when the soil is cool.
Common Mistakes to Avoid
Even though storing tulips is straightforward, avoiding a few common pitfalls will help you achieve the best results.
Don't Store Near Fruit
If you decide to store your bulbs in a spare refrigerator to keep them cool, be very careful. Do not store them in the same refrigerator as ripening fruit, especially apples and pears. These fruits release ethylene gas, which is harmless to humans but can kill the developing flower bud inside a tulip bulb.
Avoid Premature Cutting
It can be tempting to "clean up" the garden by cutting off the green leaves as soon as the flower is gone. Resisting this urge is the most important part of the process. If the bulb doesn't have time to absorb those nutrients, it will be "empty" and won't have the strength to bloom again.
Watch Out for Moisture
Moisture is the number one enemy of stored bulbs. Always double-check that your storage spot hasn't become damp due to a summer storm or a humid basement. If you see any signs of mold during the summer, discard the affected bulbs immediately and move the rest to a drier location.
Conclusion
Lifting and storing tulip bulbs over the summer is a rewarding practice that connects you more deeply with the lifecycle of your garden. It protects your bulbs from the stresses of summer heat and moisture, ensuring they remain healthy and strong for their next performance. Whether you are clearing space for new summer annuals or simply want to give your favorite Darwin Hybrids the best chance to return, these simple steps make the process easy and achievable for any gardener.
At Longfield Gardens, we take pride in providing high-quality bulbs that are ready to thrive in your home landscape. By taking a little extra time to care for your bulbs during their summer sleep, you are setting the stage for a spectacular spring show.
- Wait for the foliage to die back completely to ensure the bulb is fully charged.
- Cure the bulbs in a dry, shaded area before moving them to long-term storage.
- Use breathable containers like mesh bags to prevent rot and mold.
- Replant in the fall once soil temperatures have dropped.
Ready to add more color to your spring garden? Explore our wide variety of tulips and start planning your most beautiful season yet.
FAQ
Can I store tulip bulbs in the refrigerator?
Yes, you can store tulip bulbs in a refrigerator if you don't have a cool basement or garage. However, you must ensure there is no ripening fruit in the same fridge, as the ethylene gas produced by fruit can destroy the flower buds. Keep the bulbs in a breathable paper bag and check them periodically for any signs of moisture or mold.
How do I know if my stored tulip bulbs are still good?
Use the "touch test" to check the health of your bulbs. A good bulb should feel firm and solid, similar to a fresh onion, and have some weight to it. If a bulb feels mushy, hollow, or light as a feather, it has likely rotted or dried out and should be discarded.
Do I need to wash the bulbs before storing them?
No, you should never wash tulip bulbs with water before storage. Adding moisture can encourage fungal growth and rot during the summer months. Instead, let the bulbs dry in a shaded area and then gently brush off any excess soil with your hands or a soft brush.
Will all my stored tulip bulbs bloom again next year?
While storing them correctly gives them the best chance, not every tulip variety is naturally perennial. Large, highly hybridized varieties may produce smaller blooms or only foliage in their second year. For the most reliable repeat blooms, focus your storage efforts on Darwin Hybrids, Fosteriana Tulips, or species tulips.
