Yellow Mammoth Crocus

Availability: Out of stock

We know what you're thinking, the words "Mammoth" and "Crocus" seem like antonyms! Well, this brilliant Crocus variety is here to break the rules and prove this stereotype wrong. The Yellow Mammoth Crocus (Crocus 'Yellow Mammoth') blooms prolifically with bright honey-yellow cuppy flowers!

With a mammoth-sized impact, there's no better way to announce the return to life after the winter than with these spectacular Crocuses. Feed a host of early-emerging beneficial insects with these nectar and pollen-rich resources and breathe in their fresh sweet fragrance!

What makes these Crocuses mammoths? They grow impressive inches taller than other varieties. And as a Crocus vernus, their blooms are big, showy, and the first to appear as winter melts into spring.

This reliable variety of Crocus rivals the warmth and beauty of spring sunshine with its golden yellow color and cupped blossom. The Yellow Mammoth Crocus also is considered long-lasting, and its petals continue to grow even as its yellows transform to softer tones.

Planting and Application:

Crocuses are a staple for any garden. They're one of the easiest spring bulbs to care for and they're always a welcome sight. Crocus are fantastic for both early spring color outdoors and even winter forcing indoors! Containers and small-scale gardens are perfect for these larger-than-life perennial bulbs!

Yellow Mammoth Crocuses are the perfect choice for drifts of color through your spring lawn. They also stand out when used against hardscaping and outside your garden barrier. The most natural location for these buttery beauties is along the wood's edge. By the end of spring, these extremely hardy plants go into hiding as they await their return the following year.

Rock Gardens, cut flower borders, and Cottage gardens relish the honey-butter hue while paths and edging along garden beds gain cute, spiky, space-saving greenery and yellow spring color. Use in groupings and en mass because these easy-care perennial bulbs are low-maintenance!

  • Honey-Yellow Blooms
  • Spiky Two-Tone Short Green Foliage Clumps
  • Early Spring Blooms For Pollinators
  • Small-Scale Indoor & Outdoor Spring Color
  • Easy Care Edging, Borders, En Masse & Container Plants!

#ProPlantTips for Care:

Crocus often don't require thinning for years and they thrive in full sun to partial shade. Provide moderate moisture and some bulb fertilizer at the time of planting in the fall. Trim the foliage back after it yellows in the late summer or fall after frost. When forcing bulbs indoors, or so they will bloom in the spring, these fall-planted bulbs need at least 6-8 weeks of Chill Hours. This chill time stimulates them to bloom, so if you are in a warm winter climate or growing them for winter color, give them a cool location to rest before planting.

  • Full Sun & Partial Shade
  • Any Well-Drained Soil
  • Moderate Moisture Needs
  • Clean Foliage After It Yellows
  • Deer Resistant
  • Low Maintenance Perennial Bulb

Invite the joy and sunshine into your early spring garden on a grand scale! Pick up your Yellow Mammoth Crocus today and enjoy some of the largest Crocus blooms you'll ever see! Order quality perennial Crocus bulbs today! Nature Hills Nursery will reserve your order for you in the proper conditions and ship your order to you at the right fall planting season for your Hardiness Zone!

Buying Options for Plants

Nature Hills sells a large variety of plants with several options available. Plants are offered in both potted containers and as dormant bare root without soil. Here is a helpful resource to understand your options as you create a beautiful landscape with help from Nature Hills.

Ever wonder what a larger plant will mean for your landscape? Container Sizes are really all about the age of the plant!

Seasonally, Nature Hills offers hand selected, high quality bare root trees, shrubs and perennials. Bare root plants are sold by height from the top of the root system to the top of the plant. Plants may be taller than the height minimums.

  • Popular sizes of select trees are 1 foot, 2 feet, 3 feet, etc.
  • Popular sizes of select bare root plants is 1 foot, 18 inches, etc.

Nature Hills Container Size by Volume

Keep in mind, specific varieties and different growing conditions can affect the rate at which plants grow. Variations in size may occur.

Young Plants to 18 Months
Size Volume
2"x2"x3" Ranges from .18 to .21 dry quarts / .198 to .23 dry liters in volume
4.5" Container Equal to .65 dry quart / .72 dry liter in volume
Sprinter Pot Equal to .63 dry quart / .69 dry liter in volume
4" Container Ranges from .31 to .87 / .35 to .96 dry liter in volume
6" Container Equal to 1.4 dry quarts / 1.59 dry liters in volume
1 Quart Equal to 1 dry quart / 1.1 dry liter in volume
5.5" Container Equal to 1.89 of a dry quart / 2.08 dry liters in volume
4"x4"x5" Ranges from .8 to 1.1 dry quarts / .88 to 1.2 dry liters in volume
4"x4"x6" Ranges from 1.0 to 1.3 dry quarts / 1.1 to 1.41 dry liters in volume
4"x4"x9" Ranges from 1.1 to 2.1 dry quarts / 1.2 to 2.3 dry liters in volume
4"x4"x10" Ranges from 1.7 to 2.3 dry quart / 1.87 to 2.53 dry liters in volume
Plants 18 Months - 2.5 Years Old
Size Volume
2 Quart Equal to 2 dry quarts / 2.2 dry liters in volume
#1 Container Ranges from 2.26 to 3.73 dry quarts / 2.49 to 4.11 dry liters in volume
5"x5"x12" Equal to 3.5 to 4.3 dry quarts / 3.85 to 4.74 dry liters in volume
Plants 2 - 4 Years Old
Size Volume
#2 Container Ranges from 1.19 to 1.76 dry gallons / 5.24 to 7.75 dry liters in volume
#3 Container Ranges from 2.32 to 2.76 dry gallons / 10.22 to 12.16 dry liters in volume
Plants 3 - 5 Years Old
Size Volume
#5 Container Ranges from 2.92 to 4.62 dry gallons / 12.86 to 20.35 dry liters in volume
#6 Container Ranges from 5.25 to 6.01 dry gallons / 23.12 to 26.42 dry liters in volume
#7 Container Ranges from 5.98 to 6.08 dry gallons / 26.34 to 26.78 dry liters in volume

About Plant Sentry™

Plant Sentry is designed to protect both consumers and the nursery trade from invasive plant pests and diseases. Sites that display the Plant Sentry protection badge are protected from consumers buying and nurseries shipping material carrying invasive pests and diseases.

This proprietary eCommerce software prevents the shipment of a restricted plant to each state. The Plant Sentry system includes a shipment certification program. The Plant Sentry Compliance Officer works closely with and each nursery or fulfillment center to ensure only compliant plants are sold to customers.

Click Here to learn more

Plant Sentry


To obtain a more accurate shipment time-frame, simply enter your zip code in the “Find Your Growing Zone” box to the right. Our plants are grown all over the country and lead time on items may be different because of this. Once your order is placed, you will also receive the specific shipment time-frame information as part of your order confirmation. Once an item ships, you will receive shipment notification and tracking numbers, so you can follow along while your plant travels to your doorstep. We use FedEx, UPS, or USPS at our discretion.

Due to winter weather we have put a hold on shipping to the areas shown below in grey. You can still order now and we will ship the plant to you during an appropriate time for your zone.

*If you have found your zone already, it will be highlighted in the table below.
Color Zone Times
3 Spring 2019
4 Now
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Shipping Rates

At Nature Hills we handle, package and ship the products you order with the utmost care to ensure healthy delivery. Shipping and handling charges are calculated based on the tables below. Please note that some items include an additional handling surcharge, these will be noted on the item's product page.

From To S&H
0 - 19.99 24.99
20 - 49.99 29.99
50 - 69.99 34.99
70 - 99.99 39.99
100 - 129.99 44.99
130 - 149.99 48.99
150 - 150+ Approx 28%

Click here to see our full rates


Yellow Mammoth Crocus Is Suited to Grow in Zones 3-8
Growing Zones 3-8
More Information
Brand Nature Hills' Choice
Botanical Name Crocus 'Yellow Mammoth'
Type Perennial
Mature Height 4 - 6 inches
Sun Exposure Full Sun, Partial Shade
Soil Well Drained
Moisture Moderate
Growth Rate Fast
Flower Color Yellow
Foliage Spring Bulb
Pollinator Friendly Yes
Pruning Time After Foliage Yellows
Fragrant Yes
Spacing 3 inches