When the plant’s flowering season is about to close, it can be tempting to trim all of the old growth, but it is best to wait a little before getting out the secateurs.
Before pruning back bulb plants, the Royal Horticultural Society (RHS) suggests waiting at least six weeks after flowering is finished.
The best time to begin cutting your tulip display is typically in the summer, however the precise month will vary depending on the type you are cultivating.
Most tulips can be pruned back in June and July, with early types frequently ready to be pruned back at the start of the warm season, according to Gardeners’ World.
When to trim back tulips so that they can be planted again the next year (Image: GETTY)
After tulips blossom, do you chop them back?
It’s time to decide what to do with your fading blooms now that tulip season is past. Tulips are annual flowers that, with appropriate care, can grow into perennials in the garden.
After the tulips bloom, remove the spent flower heads with pruning shears. Trimming the leaves off now will prevent them from producing the energy necessary for the blooms to bloom the next year. The tulips can also be fertilized with a premium bulb fertilizer once they have completed blooming. After blooming, water the tulips regularly for about a month while taking care to remove any stray fertilizer from the foliage. When the foliage naturally dies back, you may either dig out the tulip bulbs and preserve them or, if the summer soil won’t be too moist, leave them in the garden.
When should tulips be pruned?
After they bloom in the spring is the ideal time to prune. Allow the seed capsule to rot and the blossom to totally fall. Pruning is permitted once the green leaves have begun to die back and become brown.
Cut the dead daffodil leaves as close to the ground as you can while pruning. The bulb won’t receive the nutrients it needs to store for the following season if the stems are cut too soon. The bulb should not be clipped if the leaves are still green.
Braided Daffodil Leaves
Some people braid daffodil leaves. (See illustration on the right.) The Daffodil Society advises against braiding daffodil leaves because they require sunlight to fully repair the bulb beneath. The following year’s flowers may suffer if the bulb doesn’t fully recover.
It is preferable to hold off on cutting the leaves for the other bulbs until they have turned brown. Pull any dead leaves with care to examine if the bulb is ready to be cut. If the leaves fall off easily, the bulb has absorbed all the nutrients it requires for the upcoming season and is prepared to prune. Every bulb is utilised with this method.
When tulips have done blooming, what should you do?
Once the blooms have faded, remove the seed heads to encourage your tulips to blossom once more the following year. After the foliage has naturally died down, dig up the bulbs around six weeks after they have bloomed. Any that are infected or damaged should be discarded after drying. Replant in them in the fall after keeping them in trays or nets in a dark, dry location over the summer.
How are tulips trimmed to encourage growth?
The majority of the tulip bulbs we purchase have been cultivated, nurtured, and carefully chosen so they are plump and likely to yield a big flower. Becky Heath, one of the proprietors of the Virginia mail-order company Brent and Becky’s Bulbs, noted that after that first flowering, the mother bulb splits into smaller bulbs as a mechanism of reproduction. The energy required to produce a large blossom the following year cannot be stored in those bulblets.
However, certain tulip varieties do a better job at developing robust offspring. Furthermore, all tulips thrive more successfully when planted in the right location and given the right care.
Fosteriana and the original Darwin tulips were crossed to create the giant Darwin hybrid tulips, which are noted for their consistency. They are really frequently advertised as perennial tulips.
According to Heath, their bulbs don’t break up as easily, which enables them to make a powerful comeback.
“They resemble something of a tulip powerhouse. Simply put, they have extraordinarily robust genetics “according to Jo-Anne van den Berg-Ohms of Connecticut-based mail-order merchant John Scheepers Inc. She is Scheepers’ great-niece, who in the 1950s brought enormous Darwin hybrids to America.
Large blossoms on sturdy stems are produced by this kind of tulip. They come in a somewhat large variety of colors, some of them are striped.
Fosteriana tulips, commonly known as Emperor tulips, are another kind that typically thrives, according to Tim Schipper of Colorblends, a Connecticut-based business that distributes tulip bulbs in bulk. According to him, Fosteriana tulips grow well in Northeast Ohio but less so in more temperate regions.
Fosterianas’ ability to become perennials is partially genetic, according to Schipper, but it also has to do with the early bloom time. Fosteriana tulips have a lengthy growing season that provides them plenty of time to refuel their energy reserves for the following year, assuming the weather is agreeable, he said.
They have big, elongated flowers and are a little shorter than Darwin hybrids.
Planting species tulips, also known as botanical tulips, is another way to get tulips to come back. They resemble their natural progenitors more than the large tulips that have been created through hybridization because they are smaller, more delicate plants.
Tulip species reproduce and form clusters that get bigger every year, a process known as “naturalizing,” in addition to coming back every year. According to van den Berg-Ohms, that process begins when bulblets produced by the mother bulb become large enough to separate off and develop their own flowers.
Species tulips can grow anywhere from 5 to 12 inches tall, depending on the variety. Tulipa biflora, a little white flower with a yellow center, and T. praestans fuselier, a multiflowering tulip with a vivid orange-red color, are just a couple of examples of the species.
According to Schipper, these little plants offer a subtle burst of color rather than a dramatic display. They do best in areas where they will receive enough sunlight, such as rock gardens, walkway margins, and tree drip lines.
Schipper believes that altering one’s perspective is one of the most crucial elements in perennializing tulips. You must think about where the tulips have the highest chance of long-term survival rather than following where you want them to grow.
Tulips prefer soil with a pH of 7, good drainage, and at least six hours of sunlight each day. The more closely you can mimic their original mountainous regions in central Asia, when winters are bitterly cold and summers are dry, the better your chances will be, according to Schipper.
Well-drained soil, according to Heath, is crucial in the summer. The bulbs are then inactive, and she claimed that “much like me, they want to sleep in a dry bed.”
Schipper advised against planting too early in the year. When asked when the fall leaf color is at its best, he advised waiting until daytime temperatures were in the 70s and nighttime temps were in the 40s.
Tulips can be kept coming back by planting them further into the ground than other types of bulbs. According to van den Berg-Ohms, this gives them better protection from temperature fluctuations and increases their exposure to the minerals and other healthy components of the soil.
Heath advises planting at a depth equal to four times the bulb’s height. She claimed that because of the increased ground pressure at that depth, the bulbs typically resist breaking.
If the fall has been dry, she advised watering the plants right afterwards to help the roots take root.
According to van den Berg-Ohms, tulips don’t require fertilizer when they are planted. In the bulb, they already have everything they require.
However, after the first year, fertilization can increase their strength, according to her. Three times a year, in the fall, early spring when the sprouts first show, and late spring when the blossoms begin to wither, she advises applying an organic fertilizer by way of a light sprinkle. She advised picking a fertilizer with more phosphorus than nitrogen or potassium.
In the summer, when the bulbs are dormant, watch that they don’t get too much moisture. When water-loving annual flowers are planted in the same area after tulips finish flowering, Schipper said there is frequently an issue with excess moisture. Tulip bulbs can perish if they are watered at the same time as annual plants during the summer.
Additionally, Van den Berg-Ohms advised against cutting the bigger varieties of tulips to bring inside. She claimed that cutting off their stems reduces their capacity to store energy. To avoid the plant putting its energy into seed production, wait until the flowers have finished flowering and are beginning to die back before cutting off the flower heads about an inch below the base.
Tulips of the lesser species don’t require deadheading. In fact, Heath said that leaving the flower heads on encourages seed germination, possibly leading to the growth of additional plants.
(You shouldn’t do it with the larger tulips because a seed doesn’t bloom right away. Keeping the energy of the current plant is preferable to trying to create new ones.)
Allow the foliage to wither for up to eight weeks before removing it. Even if it’s not particularly gorgeous at that point, the experts advised against braiding it to make hair look more tidy. So that the plants can use photosynthesis to replenish the bulbs, you should leave as much of the foliage exposed to the sun as you can.
Vole and deer problems? Plantskydd, a repellant produced from dried blood, is advised by Heath.
According to Schipper and van den Berg-Ohms, a warmer spring can shorten the growing season by causing the flower bud to open before the plant reaches its full height. As a result, there is less plant mass left to use photosynthesis to produce food for the following year.
And some locations simply have better circumstances than others. In one area of your yard, tulips might come back every year, but not in another, according to Schipper. People frequently phone him asking to plant the same type of tulips that their grandmothers’ yards used to have in bloom every year, but the microclimate, not the particular variety of tulip, was probably to blame.
The first year’s bloom will be the nicest with the larger tulips, he said. The years after that won’t ever be as remarkable, but “it’s still respectable,” he remarked.
Where should tulips be cut after blooming?
First, remove the flowers. It’s crucial to only remove the flower head and leave the foliage on the tulip as the bloom starts to fade. Simply remove the fading blossoms by clipping just below the flower’s root. This prevents the tulip from producing a seed head while preserving the foliage and stems.
Are tulips okay to be left in the ground?
Mix three parts multipurpose compost to one part grit to make potting compost. Next, fill your container such that this length is the space between the compost at the bottom and the top edge of the rim. This height is the height of two or three bulbs put end to end. Place the bulbs on top of the compost when it is well leveled, leaving about a finger’s width between each bulb. The remaining compost mixture should be spread over the bulbs, leaving the soil about 2.5 cm (1 in) below the rim. When they start to grow and flower, you may always move them into their final location after giving them adequate watering.
Use three parts loam-based compost, such as Melcourt SylvaGrow with additional John Innes, mixed with one part grit to preserve the tulips in their pots for more than one season. See the RHS guide for additional details on growing bulbs in containers.
Make a “bulb lasagna” by placing two or three layers of bulbs in one pot for a bigger container show.
Planting specialist tulips in containers
Fill containers with a mixture of one part grit and two parts loam-based compost, such as Melcourt SylvaGrow with additional John Innes. Directly beneath the bulbs, a coating of angular sand will aid in drainage and stop bulbs from decaying. To avoid soil splashing flowers and weeds developing, top-dress the pot with grit after covering the bulbs.
Containers outdoors
Before bulbs emerge, if the compost appears damp during rainy weather, relocate the plants temporarily to a protected area next to a fence or house wall or place them in an unheated greenhouse. They can be placed back where they were after the compost has slightly dried. Keep your tulips well-watered if dry weather comes while they are growing (beginning in February or until the leaves show). Poor growth or a shorter flowering time can result from a water scarcity.
In Borders
If there is enough rain to keep the ground moist, tulips in beds and borders typically don’t need watering. Only use water during extended dry spells (greater than two to three weeks), with the goal of keeping the ground moist rather than soggy.
Feeding
Feeding encourages development and flowering while restoring nutrients to the bulb when combined with watering. This promotes healthy flowering of tulips the next year. Feed plants after they begin to grow (about March), using a potassium-rich liquid fertilizer like tomato feed. Once the leaves start to yellow and die back, feeding can be discontinued. There is no need to feed bulbs if you are growing tulips for bedding and discarding the bulbs once they have done flowering.
Deadheading
Tulips can produce seedheads after flowering. Deadheading is the removal of these by severing the stalk immediately above the leaves. You might want to wait until the seedheads are fully matured if you’re planting specialty tulips because some of them can be grown from seed. For information on how to cultivate tulips from seed, see Propagation below.
Encouraging reflowering
When left in the ground, border tulips frequently do not bloom in their second year. They are frequently viewed as seasonal décor (bedding) and removed after flowering because of this. This may seem wasteful, but autumn is a great time to buy bulbs since they are readily accessible, relatively priced, and they produce a more consistent floral display. Some tulips, such as the Darwin hybrids and Kaufmanniana varieties, are worth leaving in the ground since they are more likely to reflower. See our list here for varieties that are more likely to reflower.
Tulip bulbs can be lifted, dried, and stored over the summer to encourage reflowering. This mimics the natural environment where tulips rest throughout the warm, dry summers.
- When the foliage turns yellow, remove bulbs (about six weeks after flowering)
- Place the entire plant or bulb in trays until the leaves become straw-colored if you need to lift early.
- Bulb dirt should be removed, and any that exhibit damage or sickness (such as blue/white mold or mushy flesh when pressed with the thumb) should be thrown away.
- Allow bulbs to completely dry (the brown skin becomes papery)
- In trays or net/paper bags, keep bulbs in a warm, dark, well-ventilated location between 18 and 20 C. (65-68F)
- Replanting bulbs in the fall (September to November)
Replant saved bulbs in less significant beds, borders, and containers because reflowering isn’t always possible, and acquire new ones for more significant or noticeable spots (e.g. by the front door). It’s also a good idea to select the biggest bulbs for prominent spots to guarantee a better display.
Specialty tulips, such as alpine varieties, can be left undisturbed in their containers or the ground, where they frequently expand in quantity on their own.
No trimming or training is required for tulips. Simply cut off the straw-colored wilted stems and foliage in the summer. Typically, stems can be simply removed without needing to be cut.
The purpose of propagation is typically to increase specialized tulips. Border tulips are typically not propagated because it is easy to get affordable, flowering-size bulbs for purchase. However, either can be used with these techniques. You can expand your tulip bulbs in two different ways:
By offsets, we mean young bulbs that grow organically around the main one. When lifting plants, they can be detached and dried preserved over the summer. In the fall, replant offsets at least 20 cm (8 in) deep. It could take three to four years for little offsets to reach flowering size.
By seed: Because Border varieties of tulips don’t typically generate seed, try this method with smaller Specialist tulips. In trays or pots of loam-based compost, such as Melcourt SylvaGrow with additional John Innes, sow papery seed that was harvested this year. Put a thin layer of sieved compost over the seed before finishing with a 1/2 cm (1/4 inch) layer of horticultural grit. Leave the container outside since seeds need to be chilled to germinate. Springtime brings forth seedlings, which normally take three to four years to mature into flowering plants.
In gardens, species tulips like Tulipa sprengeri self-seed under the right circumstances. Additionally, Tulipa sylvestris will grow via stolons (underground stems).
Pests and illnesses can sometimes affect tulips, especially when they are grown in the same soil for an extended period of time. Their health could also be impacted by the conditions of growth.
- Feed plants with tomato fertilizer while they are growing if they don’t blossom. Increased nutrient return to the bulb aids in bloom formation for the next year. Reflowering of border tulips is challenging on moister soils that don’t dry out in the summer.
- Shallow planting results in many tiny bulbs not blooming. Bulbs should be replanted at least three times as deep.
- short-stemmed tulips possibly as a result of late planting or mild winters
- Bulb-digging grey squirrels are common. Use chicken wire to cover bulbs in containers. Plant bulbs in the ground in chicken wire-covered aquatic baskets. Once leaves appear, the wire can be removed.