For the past ten years, we've had the good fortune of ordering thousands of bulbs from A.D.R. each fall to help further beautify Newport, RI. Not only is the quality of the bulbs outstanding, so is their customer service and attention to detail.
John Hirschboeck
, Daffodillion
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Gladiolus 'Rose Supreme' is a grandiflora variety featuring warm salmon-pink blooms with creamy centers. The ruffled petals are closely arranged on tall, sturdy spikes, creating an elegant vertical display in summer gardens. Growing 36 to 48 inches tall, it thrives in full sun with well-drained soil and requires consistent moisture during the growing season. Hardy in USDA zones 7 to 10, the corms should be lifted and stored in colder climates. This variety is excellent for borders, containers, and cut arrangements.
| Description | Price | |||
|---|---|---|---|---|
| Bin Box of 100 Bulbs, Size 12+ | $29.60 | |||
Get Notified When Back In StockComplete this form and we'll notify you when SKU SRET25065012 is restocked. | ||||
| 10 Retail Packages of 10 Bulbs, Size 12/14 cm | $34.00 | |||
Get Notified When Back In StockComplete this form and we'll notify you when SKU SRET25065012 is restocked. | ||||
| Bulk Tray of 500 Bulbs, Size 12+ | $130.00 | |||
Get Notified When Back In StockComplete this form and we'll notify you when SKU SBUL25065012 is restocked. | ||||
Planting: Plant corms in spring after the last frost, 4 to 6 inches deep and 6 inches apart, with the pointed end facing up. For continuous blooms, stagger plantings every 10–14 days until midsummer.
Location: Full sun is best. Choose a sheltered spot to protect tall flower spikes from wind.
Soil: Well-drained, sandy or loamy soil with a slightly acidic to neutral pH (6.0–7.0). Add compost or grit to improve drainage.
Watering: Water deeply after planting, then weekly during active growth. Mulch helps retain moisture and suppress weeds.
Temperature: Hardy in USDA zones 8–10. In colder zones, lift corms in fall and store in a cool, dry place.
Fertilization: Apply a balanced fertilizer (e.g., 5-10-10) at planting, then every 4–6 weeks during the growing season.
Pruning: Remove spent flower spikes to encourage more blooms. Allow foliage to die back naturally to feed the corm.
Staking: Tall varieties benefit from staking to prevent flopping. Insert supports early to avoid damaging roots.
Propagation: Lift and divide corms in fall. Replant healthy corms and save offsets for future seasons.
Pest & Disease: Watch for thrips, aphids, and fungal issues. Rotate planting sites and ensure good air circulation.
| Height | 3 Feet |
| Spread | 6-12 Inches |
| Spacing | 6-8 Inches |
| Hardiness Zone | 8-11 |
| Color |
Pink |
49 Black Meadow Rd
Chester, NY 10918 USA
Phone: (800) 990-9934
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