How to Grow Penny Yellow
Wikimedia Commons
Penny Yellow
Linaria maroccana 'Penny Yellow'
flowerPenny Yellow is a compact, fast-growing annual flower that produces bright, cheerful golden-yellow snapdragon-like blooms. It reaches only 6-8 inches tall, making it ideal for containers, borders, and small spaces. The prolific flowering and long bloom season provide color from spring through frost.
When should you plant Penny Yellow 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 Penny Yellow timeline · Pittsburgh, PA (Zone 6b)
-
Plant Penny Yellow
Around Apr 17Near Pittsburgh's average last spring frost.
-
Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
-
First Penny Yellow blooms
Around May 22≈ 35 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Penny Yellow dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 2-10 as an annual; most vigorous in zones 3-9
Sign up free to see if Penny Yellow grows in your zone — and get a personalized planting timeline.
Get my Penny Yellow timeline →Growth Stages
Germination & Seedling
10-14 daysTiny seedlings emerge with first true leaves visible within 7-10 days. Cotyledons are small and delicate.
Keep soil moist but not soggy. Provide bright, indirect light. Thin seedlings to 6 inches apart once first true leaves appear.
Vegetative Growth
2-3 weeksPlant develops bushy, compact foliage with multiple stems branching from the base. Leaves are narrow and needle-like.
Water regularly, pinch back growing tips once plant reaches 2-3 inches to encourage bushier growth and more flower buds. Begin low-nitrogen fertilizing.
Budding & Early Bloom
2-3 weeksFlower buds form at stem tips, developing into tight clusters. First flowers begin to open, revealing bright yellow petals.
Maintain consistent moisture and sunlight. Switch to balanced or slightly phosphorus-rich fertilizer to encourage flowering. Deadhead spent flowers regularly.
Full Bloom
4-8 weeksPlant is covered with bright golden-yellow flowers in terminal spikes. Blooms are abundant and colorful.
Deadhead regularly to extend bloom season. Water moderately; avoid overwatering. Fertilize every 2-3 weeks with balanced formula.
Sustained Flowering & Decline
6+ weeks until frostContinuous bloom production with occasional gaps. Flowers may be slightly smaller as plants mature. Growth slows in intense heat or frost approaches.
Continue deadheading. Reduce watering as temperatures cool in fall. Stop fertilizing 4-6 weeks before first frost.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
Spray with water to dislodge; use insecticidal soap or neem oil for heavy infestations. Introduce ladybugs for biological control.
-
Increase humidity by misting foliage. Use miticide or neem oil if severe. Ensure good air circulation.
-
Use yellow sticky traps. Spray undersides of leaves with insecticidal soap or neem oil weekly.
-
Improve air circulation. Apply sulfur dust or fungicide at first sign. Remove heavily affected leaves.
Uses
Edible Flowers for Garnish
CulinaryPenny Yellow flowers are edible and add bright color and mild, slightly tangy flavor to salads, desserts, and cocktails. Use petals fresh for garnish. [source]
Cut Flower Arrangements
CraftThe cheerful yellow spikes make excellent fresh cut flowers for small bouquets and vases, lasting 5-7 days indoors when properly conditioned. [source]
Pollinator Attraction
WildlifePenny Yellow flowers attract bees, butterflies, and hoverflies, making it valuable for pollinator gardens and supporting beneficial insect populations. [source]
Container & Border Gardening
HouseholdPerfect for hanging baskets, window boxes, patio containers, and garden borders due to its compact, mounding habit and prolific flowering. [source]
Traditional Uses
MedicinalLinaria species have been used in traditional herbalism for various minor ailments, though modern evidence is limited. Not recommended for medicinal use without professional guidance. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Penny Yellow is grown for ornamental flowers, not harvest. Pinch or deadhead spent blooms regularly to encourage continuous flowering throughout the season. Ideal time to deadhead is early morning when stems are turgid.
Fun Facts
- 🌱 Penny Yellow is part of the Linaria genus, commonly called 'Toadflax,' which has over 180 species native to the Mediterranean and temperate regions worldwide.
- 🌱 Despite its common name 'Penny,' this variety produces flowers that are much larger than pennies—the name more likely refers to ease of growth and affordability of seeds rather than flower size.
- 🌱 Penny Yellow seeds are so tiny that a single seed packet often contains 5,000+ seeds, making it incredibly economical for gardeners covering large areas or multiple containers.
Gardening Terms
New to gardening? Learn about terms used in this guide:
Join 30,000 gardeners planning their gardens with LizPlants.
Get your personalized Penny Yellow planting timeline
Tell us your zip code and we'll calculate exactly when to start Penny Yellow 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 Penny Yellow timeline →