How to Grow Sunny Foster
Wikimedia Commons
Sunny Foster
Osteospermum ecklonis 'Sunny Foster'
flowerSunny Foster is a compact, sun-loving daisy cultivar featuring vibrant yellow petals with a dark purple center disk. This tender perennial blooms prolifically from spring through fall and is prized for its cheerful appearance and long flowering season. It's commonly grown as an annual in cooler climates and works beautifully in containers, borders, and mixed plantings.
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Example Sunny Foster timeline · Pittsburgh, PA (Zone 6b)
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Plant Sunny Foster
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 Sunny Foster blooms
Around Jun 1≈ 45 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Sunny Foster dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 9-11; grown as an annual in cooler zones (5-8)
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Seedling
2-3 weeksTiny green cotyledons emerge; delicate true leaves follow. Plants are fragile and susceptible to damping-off.
Maintain consistent moisture (not wet) and provide bright light. Use well-draining seed mix. Avoid overhead watering.
Vegetative
3-4 weeksDense, bushy foliage develops with fine, feathery leaves. No buds present yet. Plants grow compact and mounding.
Pinch growing tips at 4-6 inches tall to encourage branching. Provide full sun and allow soil to dry slightly between waterings. Minimal fertilizer needed.
Budding & Early Flowering
1-2 weeksFlower buds appear at branch tips; first blooms open with yellow petals and dark centers. Buds continue forming.
Maintain consistent watering without waterlogging. Deadhead spent flowers to encourage continuous blooming. A light weekly fertilizer (diluted) can support flowering.
Peak Flowering
8-12 weeks (spring through fall)Abundant daisy-like flowers with bright yellow petals and dark purple-black disk centers cover the plant. Blooms appear in waves.
Deadhead regularly to maintain blooming. Water deeply but allow drying between waterings. Provide excellent air circulation to prevent fungal issues.
Decline & Dormancy
Variable; 2-4 months depending on climateFlowering slows with shorter days and cooler temperatures (fall/winter). Foliage may persist but growth stalls.
Reduce watering significantly. Move potted plants to a bright, cool location (50-60°F) or prune back by half. In warm zones, may reflush with spring warmth.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with insecticidal soap or neem oil; improve air circulation; reflective mulch can deter. Remove heavily infested leaves.
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Spray with strong water jet to dislodge; use insecticidal soap or neem oil. Encourage natural predators like ladybugs.
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Increase humidity and improve air circulation; spray with neem oil or insecticidal soap. Avoid over-fertilizing.
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Ensure excellent air circulation; avoid wetting foliage. Spray with sulfur dust or baking soda solution (1 tbsp per gallon water with a drop of dish soap) at first sign.
Uses
Edible Flowers
CulinarySunny Foster petals are edible and non-toxic, offering a mild, slightly tangy flavor. They make attractive garnishes for salads, desserts, and beverages. [source]
Cut Flowers & Floral Arrangements
CraftLong-stemmed blooms are excellent for cutting and last well in fresh arrangements. The cheerful yellow and contrasting dark center make them popular for bouquets and mixed floral designs. [source]
Container & Bedding Display
HouseholdSunny Foster's compact, mounding habit and prolific blooming make it ideal for pots, hanging baskets, window boxes, and mixed containers. Also excellent for brightening garden beds and borders. [source]
Pollinator Attraction
WildlifeThe open daisy-form flowers attract bees, butterflies, and other beneficial insects throughout the growing season, supporting pollinator populations. [source]
Harvest Tips
Deadhead spent flowers regularly by pinching or cutting spent blooms just below the flower head. This encourages continuous blooming throughout the season. Cut bouquets in early morning when stems are turgid; flowers last 5-7 days in a vase with fresh water. In zones 9-11, plants can reflush after being cut back by half in late summer.
Fun Facts
- 🌱 Sunny Foster is a cultivar of Osteospermum (also called African daisy), native to South Africa, though the name 'Sunny Foster' honors its bright disposition and is not geographically indicative.
- 🌱 Unlike many daisies, Osteospermum blooms close at night and on cloudy days, a behavior called nyctinasty; 'Sunny Foster' is less prone to this than some varieties, staying open more reliably.
- 🌱 Tender perennial Osteospermums can live for several years in frost-free zones but are often grown as cool-season annuals in temperate regions, thriving in spring and fall when many other flowers fade.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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