Meet one of our most dependable, drought and heat tolerant flowering plant annuals! This Texas primrose plant, which was derived from a native Texan species, has proven in trials to thrive in hot, arid, sunny conditions and is among the most reliable drought tolerant annual flowers for challenging climates.
Even in 100°F weather, established plants only need watering every few days. Additional trials have also revealed its versatility and merit in warm, humid climates, making this Texas primrose plant one of the best annuals that everyone can grow well. It is ideal for growing in containers and landscapes where radiant yellow primrose flowers cover the finely textured foliage while attracting beneficial pollinators all season. These bright blooms also provide yellow flowers for sunny gardens, adding color and resilience in hot conditions.
Superlophus™ Sunglow Oenothera was formerly named Ladybird® Sunglow Calylophus.

| Blossom Color | Yellow |
| Bloom Season | Planting To Frost |
| Exposure | Sun |
| Height | 4-8 in |
| Width | 18-24 in |
| Spacing | 8-12 in |
| Container Sizes | 104, 104 Spacer |
| Hardiness Zones | 8, 9, 10 |
| Wildlife Attracted | Bees,Birds,Butterflies |
| Wildlife Deterred | Deer |
| Features | Meet one of our most dependable, drought and heat tolerant flowering plant annuals! This Texas primrose plant, which was derived from a native Texan species, has proven in trials to thrive in hot, arid, sunny conditions and is among the most reliable drought tolerant annual flowers for challenging climates.
Even in 100°F weather, established plants only need watering every few days. Additional trials have also revealed its versatility and merit in warm, humid climates, making this Texas primrose plant one of the best annuals that everyone can grow well. It is ideal for growing in containers and landscapes where radiant yellow primrose flowers cover the finely textured foliage while attracting beneficial pollinators all season. These bright blooms also provide yellow flowers for sunny gardens, adding color and resilience in hot conditions.
Superlophus™ Sunglow Oenothera was formerly named Ladybird® Sunglow Calylophus. |
| Adaptable as a Houseplant | No |
| Bog Plant | No |
| Is Disease Resistant | No |
| Drought Tolerant | Yes |
| Edible | No |
| Erosion Control | No |
| Fragrant Flower | No |
| Fragrant Foilage | No |
| Heat Tolerant | Yes |
| Native to North America | Yes |
| Salt Tolerant | No |
| Succulent | No |
| Water Plant | No |
| Uses |
This Texas primrose plant is great in containers where good drainage is ensured, but is also a great garden plant as long as well-drained soil is available. It is a very heat tolerant flowering plant material and performs exceptionally well among drought tolerant annual flowers in the landscapes. This radiant blooms create cheerful yellow flowers for sunny gardens, especially in hot regions where many plants struggle. |
| Maintenance Notes |
Plant in containers or well-drained landscape beds. Once plants are established in the landscape, this Texas primrose plants shouldn't need much care. The best performance is provided by soil kept on the dry side. Overwatering is the most likely problem you'll have with these plants, which naturally perform like many drought tolerant annual flowers.
Do not treat them too well and they'll be happy campers. This is not a heat tolerant flowering plant that needs a lot of plant food. For plants in the landscape a dose of controlled release plant food at planting will usually be sufficient. If you live in a climate with a very long summer, reapplying after 3 or 4 months may be beneficial.
For plants in containers, a dose of controlled release plant food at planting time is also recommended. However, reapplication of plant food is more likely to be needed in containers. Monitor your plant and reapply if the plant looks to be tired or if the foliage seems too light.
A water soluble plant food can add instant energy if you notice that your plants seem to be struggling. A water soluble plant food application to quickly increase energy, followed by a controlled release application of plant food will keep your plants happy for months and support more yellow primrose flowers.
If your planting gets a bit open or straggly looking, you can use a sharp pair of scissors or pruning shears to trim it back. Look to take no more than 1/3 the volume of the plant. I usually follow a trim, with an application of water soluble plant food. The plant food/trim combination will stimulate new growth and branching and after a week or two to recover will result in a better branched and more floriferous plant with more yellow primrose flowers and bright yellow flowers for sunny gardens. In long season climates, trimming more than once can be beneficial.
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| 2025 | Top Performer - UGA |
| 2025 | Top Performer - Iowa State |
| 2025 | Top Performer - Mississippi State University - Crystal Springs |
| 2025 | Best of Breed - North Carolina State, JC Raulston Arboretum |
| 2025 | Leader of the Pack - Late Season - North Carolina State, JC Raulston Arboretum |
| 2025 | Leader of the Pack - Beds - North Carolina State, JC Raulston Arboretum |
| 2025 | Perfect Score - University of Tennessee - Jackson |
| 2025 | Top Performer, Best of Species - Penn State |
| 2025 | Top Performer - University of Tennessee - Knoxville |
| 2025 | Perfect Score - Hanging Baskets - University of Minnesota - Grand Rapids |
| 2025 | Bronze Medal Winner - Champaign County Illiniois Master Gardener Idea Garden |
| 2025 | Top Performer - Boerner Botanical Garden |
| 2025 | 2025 Classic City Award - UGA |
| 2023 | Top Performer - University of Guelph |
| 2023 | Top Performer - Cincinnati Zoo and Botanical Garden |
| 2022 | Perfect Score - University of Tennessee - Jackson |
| 2021 | Perfect Score - University of Wisconsin - West Madison |
| 2021 | Top Performer - Texas A&M - East Texas Bedding Plant Trial |
| 2021 | Top Performer - Young's Plant Farm |
| 2021 | Top Performer - University of Guelph |
| 2021 | Best of Breed - Beds - North Carolina State, JC Raulston Arboretum |
| 2021 | Best in Show - University of Tennessee - Jackson |
| 2021 | Top Performer - Mississippi State University - Poplarville |
| 2021 | Top Performer - Perennial - Mississippi State University - Crystal Springs |
| 2021 | Director's Select & Best of Species - Penn State University |
| 2021 | Top Performer - Cincinnati Zoo and Botanical Garden |
| 2021 | Top Performer - LSU - Hammond |
| 2021 | Top Performer - Les Exceptionelles |
| 2021 | Top Performer - Boerner Botanical Garden |
| 2021 | Perfect Score - Oregon State University |
| 2021 | Top Performer - Cornell University |