How to Grow African Violet 'Rob's Boolaroo'
Wikimedia Commons
African Violet 'Rob's Boolaroo'
Saintpaulia ionantha 'Rob's Boolaroo'
flowerRob's Boolaroo is a show-stopping African violet cultivar featuring deep purple-blue single flowers with distinctive white-edged petals and dark green, quilted foliage. This compact, indoor houseplant is prized by collectors and hybridizers for its striking color contrast and reliable blooming habit. It thrives indoors in controlled environments and produces abundant flowers with proper care.
When should you plant African Violet 'Rob's Boolaroo' in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example African Violet 'Rob's Boolaroo' timeline · Pittsburgh, PA (Zone 6b)
-
Plant African Violet 'Rob's Boolaroo'
Around Apr 17Near Pittsburgh's average last spring frost.
-
Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
-
First African Violet 'Rob's Boolaroo' blooms
Around Apr 25≈ 8 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact African Violet 'Rob's Boolaroo' dates for your own zip code.
Growing Conditions
Soil
Growth Stages
Establishment
2-3 weeksYoung plant settling into pot with root development; 2-3 rosette leaves visible
Keep soil lightly moist; maintain 65-75°F; provide bright indirect light; avoid moving plant frequently
Vegetative Growth
4-6 weeksPlant develops fuller rosette of dark green, quilted leaves; multiple leaf whorls forming
Maintain consistent moisture and temperature; fertilize every 2-3 weeks with dilute African violet fertilizer; remove any dead leaves
Flowering
6-8 weeks per cycle (can reflower every 4-6 weeks with proper care)Deep purple-blue single flowers with white-edge petals emerge from leaf axils; can produce 10-15+ blooms simultaneously
Maintain 12-14 hour photoperiod with grow lights; keep humidity 50-60%; continue regular watering and feeding; remove spent flowers to encourage more blooms
Post-Bloom Rest
2-4 weeksFlowers fade and drop; plant may show slight decline in vigor
Reduce fertilizer frequency; continue consistent care; new buds typically form within 2-4 weeks
Mature Blooming Plant
Indefinite with proper careEstablished plant with dense rosette continuously producing flowers; thick crown and multiple petioles
Maintain all care routines; consider propagation via leaf cuttings if desired; fertilize year-round at reduced strength; ensure 12-14 hours light daily
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
Isolate plant; spray with 70% isopropyl alcohol on cotton swab; treat with insecticidal soap or neem oil; repeat every 7 days for 3 weeks
-
Improve air circulation; reduce humidity to 40-50%; apply sulfur dust or baking soda spray; avoid wetting foliage
-
Isolate immediately; discard severely infested plants; treat with miticide or insecticidal soap; increase temperature to 75-80°F to accelerate lifecycle and control
-
Allow soil surface to dry slightly between waterings; use sticky traps; apply Bti (Bacillus thuringiensis israelensis) to soil; repot in fresh soil if severe
Uses
Not for consumption
CulinaryAfrican violets are ornamental houseplants and should not be ingested; they are not edible. [source]
Indoor air purification and decoration
HouseholdAfrican violets are commonly grown as decorative indoor houseplants that help improve air quality while adding color to tabletops, shelves, and window gardens. They are popular in office and home environments for their compact size and long blooming season. [source]
Propagation hobby and plant breeding
CraftRob's Boolaroo is highly valued by African violet enthusiasts and hybridizers for leaf propagation and cross-breeding projects. Collectors propagate and trade varieties, making it a popular plant for the indoor gardening hobby community. [source]
Pollinator-friendly indoor blooms
WildlifeWhile primarily an indoor plant, African violets attract small insects and hoverflies when placed near windows, providing a secondary source of pollen and nectar for beneficial insects year-round. [source]
Harvest Tips
African violets are grown for continuous blooms rather than harvesting. Deadhead spent flowers by gently pinching at the base to encourage new flower production. Propagate via leaf cuttings: remove a healthy mature leaf with 1-2 inches of petiole, insert in moist propagation medium under humidity dome, new plantlets form in 4-6 weeks.
Fun Facts
- 🌱 African violets are not actually from Africa—they are endemic to the East African mountains of Tanzania and Kenya, discovered in the Usambara Mountains in 1892.
- 🌱 Rob's Boolaroo is a named cultivar from the extensive hybridization work of hybridizer Ralph 'Rob' Robinson, who created hundreds of African violet varieties.
- 🌱 African violets have a unique property: they prefer water from below rather than overhead, which is why capillary watering systems and wick watering are the preferred methods to avoid crown rot.
Gardening Terms
New to gardening? Learn about terms used in this guide:
Join 30,000 gardeners planning their gardens with LizPlants.
Get your personalized African Violet 'Rob's Boolaroo' planting timeline
Tell us your zip code and we'll calculate exactly when to start African Violet 'Rob's Boolaroo' seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.
Get my African Violet 'Rob's Boolaroo' timeline →