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Yellow Mammoth Dutch Crocus

Crocus flavus 'Yellow Mammoth'

$11.89
$11.89 $13.99
per Bag of 20
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ZONES  3-9 | Good to grow! Zone
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Crocus flavus 'Yellow Mammoth' (Dutch Crocus) bulbs bloom in early spring with a stunning display of large, bright yellow flowers.

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Description

Crocus flavus 'Yellow Mammoth' (Dutch Crocus) are a large-flowered variety that bloom in early spring with a stunning display of bright yellow flowers. An excellent naturalizing variety, 'Yellow Mammoth' Crocus is recommended to plant with miniature Iris and other early spring blooming bulbs in full sun.

Planting & Care

Tips on Growing Fall Planted Flower Bulbs

When you receive your spring-blooming bulbs (crocus, tulips, daffodils, etc.) keep them in a dry, dark, cool place until ready to plant. They need air circulation so they will not collect moisture and rot. Planting times can vary from early October in the North to mid-to-late November in the southern regions. A good rule of thumb is to plant them about 6 weeks before the ground is frozen or after the first hard freeze. For more information see our Planting Crocus Bulbs article.

Soil Preparation for Bulbs

A compost-enriched, well-drained soil is best. Incorporate a good quality organic compost as needed. Yum Yum Mix® is recommended as an excellent source of nitrogen, phosphorus, and potassium needed for strong plants and healthy roots. Mix a small amount into the bottom of the hole before planting your bulbs.

Many bulbs prefer full sun exposure. However, Muscaria, Allium, Galanthus, Hyacinthoides, Scilla and many Daffodils will tolerate partial shade and bloom well.
Pink daffodils will hold their color longer if planted in dappled shade or morning sun/afternoon shade.

After planting, add a top dressing of compost or other organic material and water in thoroughly. If your winter is dry, water every three to four weeks throughout the winter and add more mulch if necessary.

Protect your Bulbs

Apply a mole or gopher repellent to the surface of the ground to protect bulbs from these burrowing mammals. As bulbs sprout, use our Deer Off Repellent to prevent deer and rabbits from browsing your spring blooms.

After Your Bulbs Have Bloomed

Once your bulbs have bloomed, allow the bulb foliage to brown and fade naturally since the leaves are feeding the bulb in the ground. Removal of foliage weakens the bulb and leads to fewer blooms the following year. Planting your bulbs amongst your perennials is one way to conceal the dying bulb foliage. The perennials begin to grow and fill out as the bulb foliage dies back. The perennials will then provide foliage and color in the garden from late spring through the summer and into fall. Regular fertilization with balanced organic or natural fertilizer and a re-application of mulch each fall will ensure more and more beautiful spring bulb blooms for many years!

Shipping

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As soon as your order is placed you will receive a confirmation email. You will receive a second email the day your order ships telling you how it has been sent. Some perennials are shipped as potted plants, some as perennial roots packed in peat.  The ‘Plant Information’ section describes how that item will ship. All perennials and fall-planted bulbs are packaged to withstand shipping and are fully-guaranteed. Please open upon receipt and follow the instructions included.

Perennials and fall-planted bulbs are shipped at the proper planting time for your Growing Zone. Perennial and fall-planted bulb orders will arrive separately from seeds. If your order requires more than one shipment and all items are shipping to the same address, there is no additional shipping charge. See our shipping information page for approximate ship dates and more detailed information. If you have any questions, please call Customer Service at (802) 227-7200 or contact us by email or chat.

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Key Features

Light Requirements

  • Full Sun

Bloom Time

Early spring

Advantages

  • Bee Friendly
  • Naturalizes
  • Easy To Grow
  • Container Planting
  • Small Spaces
  • Rock Gardens
  • Deer Resistant
  • Rabbit Resistant

Additional information

Mature Height

4-6" tall

Bulb Spacing

16 bulbs per sq. ft.

Soil Type

  • Average Soil
  • Compost Enriched Garden Loam Soil

Soil Moisture

  • Average
  • Moist / Wet

Planting Depth

Plant 3" deep

Planting Time

  • Fall

Growing Zones

  • Zone 3
  • Zone 4
  • Zone 5
  • Zone 6
  • Zone 7
  • Zone 8
  • Zone 9

Poisonous or Toxic to Animals

Toxic when ingested.

Neonicotinoid Free

Yes

Ships As

Bulb, Rhizome, Tuber
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Overall rating: 4.6666665 / 5 from 3 reviews.

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Reviews

Yes

"It is becoming harder to get healthy bulbs sent at the correct time for planting. When they are harvested too early, they go bad before the correct soil temperature to plant"

— Gardengal (4/5)

Last a very long time.

"Last fall marked the first time I planted bulbs at my current residence. The bulbs sprouted beautifully, and the flowers have been blooming for weeks. I believe some have remained open for at least three weeks, possibly longer. They tend to close in the late afternoon or during cooler temperatures. I'm certainly planning to plant more this coming fall."

— Dry G. (5/5)

absolutely stunning

"Beautiful color that comes up very early. Once it is gone, you have lovely foliage."

— Beatrice 8. (5/5)

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