Dahlia Mystic ‘Fantasy’ – How to Grow Guide
Dahlia Mystic ‘Fantasy’ is a striking variety with deep purple foliage and vibrant blooms that shine all summer. This guide walks you through planting, growing, feeding, harvesting, and protecting your dahlias for a season full of colour.
Overview
Dahlia Mystic ‘Fantasy’ is loved for its dramatic foliage and bright, single flowers that attract bees and butterflies. It thrives in warm, sunny conditions and grows beautifully in borders, containers, and cutting gardens.
Choosing the Right Location
Sunlight
Choose a site with full sun, receiving 6–8 hours of light daily for strong growth and abundant flowering.
Soil
- Essential: well‑draining, loamy soil
- Enrich with organic matter to boost fertility and moisture retention
Preparing the Soil
pH Level
Aim for a pH between 6.0 and 7.0.
Soil Amendment
Dig in compost or well‑rotted manure to improve structure, nutrition, and drainage.
Planting Dahlia Mystic ‘Fantasy’
When to Plant
Plant in late spring, after all frost danger has passed.
How to Plant
- Dig a 6–8 inch deep hole
- Lay the tuber horizontally with the eyes facing upward
- Cover lightly with soil
- Water immediately after planting
Watering
Initial Watering
Water well straight after planting to settle the soil.
Ongoing Care
- Keep the soil consistently moist
- Water deeply once a week, more frequently in heatwaves
- Avoid waterlogging to prevent rot
Fertilisation
Type of Fertiliser
Use a balanced 10‑10‑10 fertiliser every 4–6 weeks through the growing season.
Staking
Support
As Mystic dahlias grow taller, stake them to prevent snapping in wind or heavy rain.
Pest & Disease Management
Common Pests
- Aphids
- Slugs (especially early in the season)
Use insecticidal soap or organic controls as needed.
Disease Prevention
- Maintain good air circulation
- Avoid overhead watering to limit fungal issues
Harvesting & Enjoying Blooms
Cut Flowers
Regularly harvest blooms to encourage more flowering throughout summer.
Deadheading
Remove spent flowers promptly to keep the plant performing at its best.
Winter Care
Digging Up Tubers
After the first frost, cut back the stems and carefully lift the tubers.
Storage
Store tubers in a cool, dry, frost‑free place such as a shed, garage, or cellar.
Extra Tips
Companion Planting
Grow with marigolds to help deter pests naturally.
Bushiness
Light pinching of the growing tips early in the season encourages fuller growth.
FAQs
When should I plant Dahlia Mystic ‘Fantasy’?
In late spring once frost risk has passed.
Do dahlias need full sun?
Yes — they thrive with 6–8 hours of direct sunlight daily.
Should I dig up my dahlia tubers in winter?
Yes — after the first frost, lift and store them in a dry, cool place.
How often should I water dahlias?
Water deeply once a week, keeping soil consistently moist but not soggy.
