How to Grow Gloxinia Emperor Frederick
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Gloxinia Emperor Frederick
Sinningia speciosa 'Emperor Frederick'
flowerA stunning tropical houseplant featuring velvety, deep red flowers with contrasting white edges and throats. This hybrid gloxinia produces large, ruffled blooms above attractive fuzzy foliage and thrives as an indoor ornamental. It's prized for its dramatic, long-lasting flowers and compact, bushy growth habit.
When should you plant Gloxinia Emperor Frederick in your zone?
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Example Gloxinia Emperor Frederick timeline · Pittsburgh, PA (Zone 6b)
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Plant Gloxinia Emperor Frederick
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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First Gloxinia Emperor Frederick blooms
Around Jul 16≈ 90 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Gloxinia Emperor Frederick dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Zones 10-11; primarily grown indoors elsewhere
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Tuber Dormancy & Sprouting
2-4 weeksTubers are dormant, then send up first leaves and shoots
Plant tubers in moist potting mix indoors; maintain 70-75°F; provide bright indirect light once sprouts appear; keep soil lightly moist
Vegetative Growth
4-6 weeksPlant develops bushy foliage with characteristic fuzzy, heart-shaped leaves; multiple stems emerge
Maintain humidity 50-60%; ensure bright, indirect light; fertilize every 2-3 weeks with balanced houseplant fertilizer; remove any flower buds to encourage foliage
Bud Formation & Pre-Flowering
3-4 weeksFlower buds appear in leaf axils; buds gradually enlarge and show color
Maintain consistent moisture and bright light; continue fertilizing; provide slight cooling (65-70°F nights) to encourage blooming; ensure good air circulation
Flowering
6-12 weeks or longerLarge, velvety red flowers with white picotee edges and white throat fully open; multiple blooms appear sequentially
Maintain 65-72°F temperature; bright indirect light; consistent soil moisture; reduce nitrogen fertilizer, use phosphorus-rich formula to promote more flowers; remove spent blooms to extend flowering
Senescence & Dormancy
4-8 weeksFlowers fade, foliage yellows; plant naturally dies back as tuber enters dormancy
Gradually reduce watering; allow foliage to completely die back; store tuber in cool (50-60°F), dry location for 2-3 months; tuber can be divided before replanting next season
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Increase humidity; mist foliage daily (avoid flowers); use neem oil or insecticidal soap spray; isolate infected plant
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Remove with cotton swab dipped in rubbing alcohol; spray with neem oil or insecticidal soap every 7-10 days
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Very difficult to control; remove affected leaves; increase temperature to 75°F and humidity; discard severely infested plants
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Yellow sticky traps; spray with neem oil or insecticidal soap; improve air circulation
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Allow soil surface to dry slightly between waterings; use yellow sticky traps; apply sand layer on soil surface
Uses
Not applicable
CulinarySinningia speciosa is ornamental and not edible or suitable for culinary use. [source]
Indoor ornamental display
HouseholdEmperor Frederick gloxinias are prized as indoor decorative houseplants, adding dramatic color and elegance to living spaces, bedrooms, and offices. Their exotic appearance and long flowering period make them popular gift plants. [source]
Floral arrangements and flower pressing
CraftThe large, velvety flowers are suitable for fresh floral arrangements and can be pressed for crafts, bookmarks, or botanical art projects. [source]
Hummingbird and pollinator attraction (outdoor cultivation)
WildlifeIn tropical zones where grown outdoors, gloxinias attract hummingbirds and bees to their nectar-rich flowers, supporting pollinator populations. [source]
Harvest Tips
Gloxinias are ornamental houseplants, not harvested for food; deadhead spent flowers to encourage continuous blooming and redirect energy to new buds rather than seed production; cut spent flowers at the base of the stem with clean scissors
Fun Facts
- 🌱 Despite the common name 'Gloxinia,' modern cultivars like Emperor Frederick are actually Sinningia hybrids, not true gloxinias (genus Gloxinia). The name persists in horticulture due to historical naming conventions.
- 🌱 The velvety texture of gloxinia flowers and leaves comes from fine, hair-like structures on the surface that also help the plant retain moisture in its native tropical rainforest habitat.
- 🌱 Emperor Frederick was bred for its striking bicolor flowers and is named after a historical figure, reflecting the Victorian-era tradition of naming ornamental plants after royalty and nobility.
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