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Delphinium, Blue Mirror, ~ 45 seeds

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SKU
43053468
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Sun Preference
Full-Sun
Bloom or Harvest Time
Summer, Fall
  $3.99

Description

Delphinium grandiflora
Perennial/Blooms first year
Summer/Fall bloom
Hardy to Zone 3

A butterfly, bee, & hummingbird favorite!

Blue Mirror delphinium has fine textured foliage literally covered in sprays of intensely ultramarine blue little trumpet-shaped florets. The compact lacy plants make a lovely display in the garden and for bouquets. First introduced to England in 1818, this easy-care beauty is known in its native land of China as “Herb of the Flying Swallow.” While it’s well known that hummingbirds zero in on red, they also love true blues like this one for supplies of sweet nectar.

Seed Starting Successfully

Start your garden from scratch with Gertens' wide variety of seed packets! Whether you're a seasoned gardener or just starting out, we have seeds for every skill level and garden size. From colorful flowers to delicious vegetables, our seeds are carefully selected for their quality and performance.

Seed Starting Successfully

Grow Your Best

When to Grow Veggies & Fruits

From Our Experts

Details

Cold Winters: March - May
Mild Winters: February - April, August - September 
Sun/Shade: Full sun 
Sow Seeds: 1 inch apart, 1/4 inch deep
Days to Germinate: 21 - 28 days 
Mature Height: 18 - 24 inches 

START EARLY INDOORS 
In spring, 8 to 10 weeks before last expected frost, sow seeds 1 inch apart in a container of seed starting mix. Cover 1/4 inch deep, keep moist and provide a strong light source until seedlings are ready to plant outdoors. Feed seedlings every 2 weeks with half-strength fertilizer. Once large enough to handle, transplant seedlings 3 inches apart into deeper containers so root systems have room to develop. When plants are 3 to 4 inches tall, gradually acclimate to outdoor conditions and transplant 10 to 12 inches apart into a sunny garden spot with well-drained soil.

GROWING NOTES 
Sow Blue Mirror in early spring for mid-summer flowers the first year, late spring bloom in subsequent years. Plants can handle more summer heat than the traditional delphinium varieties. Patrol for snails and slugs on new leaves and shoots. When each flush of flower finishes, cut stalks back to plant base to encourage reblooming. Water well and fertilize regularly throughout the growing season. Plants will die back and go dormant in winter. Leave dead foliage until early spring so you know where plants are, but cut the dead branches off at first signs of new spring growth.

More Information

Mature Height (Range) 13" - 24"
Spacing in Row 1", thin/transplant to 10-12"
Days to Germination 21-28 days
Planting Depth 1/4"
Seed Packet Type Flowers
Plant Life Cycle Perennial
Bloom or Harvest Time Summer, Fall
Sun Preference Full-Sun
Common Family Name Larkspur
Brand Renee's Garden

Product Questions (12)

Starting times will vary depending on the vegetable you are growing. Each seed packet will have specific sowing instructions for that type of vegetable. Some plants, such as tomatoes and peppers, should be started indoors, 6-8 weeks before the last frost...
The process of bringing seeds outside is called hardening off. Hardening off is generally done sometime after the seedling has two full sets of normal leaves. In Minnesota, you want to begin hardening off seedlings in late April/early May.  To ...
If you have a southern facing window with all day sun, you may grow seedlings in a windowsill. Be sure to rotate the seedlings frequently to ensure the plants do not lean heavily towards the sun. For more even results, use a grow light, positioned roughly...
We recommend using either high intensity T5 fluorescent bulbs, or LED grow lights. Both setups will produce excellent results. T5s are the typical grow light, are economical and come in frequencies that are helpful for plant development. LED technology...
Grow lights should be kept roughly 4-5” above the top of seedling leaves. If you are using very powerful LEDs, you could even keep them 8-10” away.
Grow lights should be used to mimic a natural sunlight cycle for plants. We recommend using them 12 hours a day, from roughly 7am to 7pm.  
A variety of seedling trays exist for seed starting. If you are starting smaller seeds, a simple peat cell tray works great. However, the larger the seed, the larger the initial pot should be. If you are starting larger seeds indoors such as: sunflowers...
Do not start any type of fertilizer regime for young seedlings until they have at least two full sets of regular leaves. Start with a root stimulator, then after a month you may move on to a gentle, weak (half strength) water-based fertilizer. Remember...
Let the roots tell you when to transplant. When you begin to see the seedling’s root growing out of the bottom of their current pot, it is time to transplant up to something larger. We recommend using a 4” nursery pot to transplant most seedlings. In...
Gertens carries a wide variety of both spring and autumn planted bulbs. Spring planted bulbs, such as gladioli and dahlias, are best started indoors in early April, and planted outside once the soil temperatures are above 55 F. Autumn planted bulbs, ...
The big three tips are: 1) Staking and training 2) Feeding and watering and 3) Harvesting and enjoying. 1) Keeping plants trained and staked allows air circulation around crops and provides much-needed support for produce as it grows...
Gertens does carry an assortment of both perennials, as well as annual and perennial wildflower mixes. It is important to remember when growing perennials, that you will not get any flowers the first year of growth. It often takes a perennial 2-3 years...
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