Scaevola, often called Fan Flower, is a popular choice for continuous color and unique form. This plant is known for its distinct fan-shaped flowers, which typically feature five petals arranged asymmetrically, creating a “half-flower” appearance. Originating from Australia, Scaevola exhibits a vigorous, trailing growth habit, making it suitable for hanging baskets, containers, or as a ground cover. It is low-maintenance and highly tolerant of heat and drought conditions.
Planting Scaevola
Scaevola thrives in full sun, requiring at least six hours of direct sunlight daily for best blooms. While it can tolerate some partial shade, particularly in extremely hot climates, this may result in reduced flowering.
Scaevola needs well-draining soil to prevent root issues. If your soil is heavy or clay-based, amend it with organic matter such as compost or sand to improve drainage and aeration. The plant prefers a slightly acidic to neutral soil pH, ideally between 6.0 and 7.5.
When planting, dig a hole slightly larger than the root ball and ensure the plant sits at the same level as it did in its nursery pot. Space multiple plants 12 to 18 inches apart to allow for their spreading habit and proper air circulation. After planting, water thoroughly to help the soil settle around the roots and support initial establishment.
Daily Care Essentials
Scaevola needs six to eight hours of direct sun daily for prolific blooming and vibrant flower colors. Insufficient light can lead to fewer blooms and leggy growth.
Scaevola requires consistent moisture, especially during hot, dry periods, though it is somewhat drought-tolerant once established. Water when the top inch of soil feels dry to the touch, but avoid overwatering, which can lead to root rot. Allow the soil surface to dry slightly between waterings to prevent such issues.
Regular fertilization supports continuous blooming from spring until frost. A balanced liquid fertilizer, such as a 12-12-12 or 20-20-20 formula, applied every four to six weeks during the growing season, is generally effective. Some sources suggest a low-phosphorus fertilizer, as the plant can be sensitive to high phosphorus levels, which may cause foliage discoloration. Scaevola thrives in warm to hot weather, with optimal temperatures ranging between 70°F and 85°F. It is not frost-tolerant and is typically grown as an annual in climates outside USDA Zones 9-11, where it can be a tender perennial.
Pruning and Maintenance
Scaevola is a self-cleaning plant; spent blooms naturally drop off, eliminating the need for deadheading. Occasional pruning can benefit the plant’s overall shape and vigor.
Pinching back the tips of young plants encourages bushier growth and a fuller, more compact habit. Trimming back leggy or overgrown stems helps rejuvenate the plant and maintain its desired shape, promoting new growth and more blooms. This can be done mid-season to keep the plant tidy. Removing yellowing or damaged leaves also contributes to the plant’s health and aesthetic appeal.
Troubleshooting Common Issues
Scaevola is resilient and experiences few serious pest or disease problems when provided with proper growing conditions. However, common garden pests like aphids, spider mites, thrips, or whiteflies may occasionally appear. If an infestation occurs, these pests can often be managed with organic solutions like insecticidal soap or neem oil.
Diseases are typically linked to environmental conditions, with root rot being a common issue caused by overwatering or poorly draining soil. Fungal spots, like botrytis, can develop in overly humid conditions or with poor air circulation. Ensuring adequate drainage and allowing the soil to dry slightly between waterings are important preventative measures. If leaves turn yellow, it could indicate overwatering, nutrient deficiency, or cold temperatures, while wilting often points to underwatering or heat stress.