To Dig or Not to Dig? Lifting Tulip Bulbs – The Ultimate Guide

When to Dig Up Tulips (And Do You Really Need To?)

By Pomidoroved

Many gardeners constantly ask: do we really need to dig up tulip bulbs after they finish blooming? After all, we’ve all seen tulips growing and blooming entirely on their own for years… so let’s clear this up once and for all!

Let’s get this out of the way immediately: Yes, you can get away with not digging up your tulips every single year. If you didn’t have time or simply forgot, the world won’t end. So why do gardening shows, magazines, and websites so stubbornly insist that tulips must be lifted?

The truth is, regular lifting and replanting has a hugely positive effect on the reproduction and blooming of most tulip varieties. But not all of them. Species (botanical) tulips can happily grow, bloom, and multiply in the same spot for years. Many early, simple varieties that have thoroughly acclimatized to your local environment also do quite well without being dug up.

In stark contrast, fancy hybrid Dutch varieties—especially the highly prized, expensive ones—will rapidly shrink, lose their unique characteristics, and stop blooming altogether if they are not replanted. And let’s be honest, those are exactly the bulbs that line the shelves of every major garden center in the spring.

Today, we will look at exactly what happens when you regularly lift your bulbs, and how to do it right. 👩‍🌾

Why Dig Them Up? A Little Botany (I promise it’s not boring! 😉)

A tulip bulb renews itself every single year by forming a new replacement bulb, which is the one that will bloom the following year. Around this main bulb, tiny “daughter” bulbs (offsets or babies) are formed.

Even with the best care and in the best conditions, these babies can tightly crowd the main bulb, stealing its space and nutrients. Because of this, the blooming will become sparser each year or stop entirely. An overgrown clump of bulbs can sit in your garden for years looking like a sad bunch of grassy leaves, resembling a weed more than a noble flower. 🥀

Moreover, diseases spread much faster in overcrowded plantings. Every year, tulip bulbs naturally pull themselves deeper and deeper into the soil (this is just how their biology works). At extreme depths, two things happen: first, it’s too cold for proper flower bud formation, and second, it becomes harder and harder for the shoot to break through a thick, heavy layer of soil each spring. After a few more years in the same spot, the tulips will stop forming offsets entirely, meaning you can no longer propagate the variety.

Therefore, valuable tulip varieties should be dug up annually. It’s mandatory.

One more reason to dig up tulips is soil depletion. You wouldn’t grow cucumbers or carrots in the exact same spot year after year—that leads to disease and poor harvests. The same goes for tulips! By digging and replanting, we prepare a fresh, fluffy, nutrient-rich bed for them, adding fertilizer and removing the roots of perennial weeds. This can only affect their blooming in a positive way.

Pro Tip: The soil left behind after lifting your tulips in early summer can be turned, fertilized, and used immediately to plant annual or perennial summer flowers! 🌼

Alright, Time to Dig! But When?

You should start harvesting your bulbs when more than half of the leaves have turned yellow (a good rule of thumb: the top leaves should be completely yellow, and the bottom ones just starting to turn). Do this on a clear, dry morning. ☀️

If you wait until the leaves are completely yellow and crispy, the bulb nest will shatter easily, and you might accidentally leave half the babies in the dirt. In subsequent years, they will pop up like weeds in your garden beds, or if you plant a different variety there, they will mix together, creating a messy hybrid soup.

Early varieties are dug up when the leaves are drier; late varieties when they are less dry. Leaves usually yellow and dry out by late June to early July. If you start digging too early (right when yellowing begins), the bulb may not have enough time to mature, and next year’s bloom will suffer. It is also incredibly hard to dig up tulips after the leaves have completely vanished: you simply won’t be able to find where they were planted, resulting in a lot of sliced and ruined bulbs from your shovel.

Storing the Bulbs After Lifting

After digging, wash the bulbs and soak them for half an hour in a fungicide (like potassium permanganate or a commercial bulb dip). Do not pull the leaves off! Wait until they dry completely and detach effortlessly from the bulb on their own.

Once the leaves have completely died off, the scales of the bulb will take on a golden-brown color and become firm. This is the exact moment when the future flower stalks are being formed inside! For this, they need a temperature of around 20°C (68°F). Higher temperatures stimulate flower formation at the expense of leaves, while cooler temperatures do the opposite—stimulating foliage at the expense of blooms.

Knowing this, you should place your dug-up tulips in a warm, well-ventilated place to dry for up to 2 months. But never in direct sunlight! Tulips cannot tolerate it. Aim for a humidity of about 70%. Gradually drop the storage temperature down to about 12°C (54°F). Later on, right before fall planting, you can even store the bulbs in the crisper drawer of your fridge.

During digging and drying, any diseased or rotting specimens will be very obvious—throw them away immediately! Promptly removing sick bulbs will keep your variety pure and healthy. Any accidental cuts or shovel wounds should be disinfected (with an antifungal powder) to prevent infection.

After lifting, sort your bulbs by size and variety, placing them in different boxes or mesh containers, and don’t forget to label them! Keep only the largest, plumpest bulbs for next year’s main flower display. The smaller “baby” bulbs should be planted in a separate nursery bed to grow out. If you don’t sort them, your flowerbed will lose its aesthetic appeal—instead of an even, uniform display of blooming flowers, you’ll get an uneven mix of tall leaves and sparse, tiny flowers.

Now that you know all the secrets of lifting tulips, you can enjoy a luxurious, high-quality display of your favorite spring flowers every single year! 🌷✨