Grow Rosa 'First Prize' (Hybrid Tea Rose 'First Prize') for elegant, high-centered blooms that look right at home in a vase or as a focal point in a sunny bed. You will get the best flower size and color when you plant it where it receives at least 6 hours of direct sun, with good air movement around the foliage.
Start with well-drained soil enriched with compost and keep the root zone evenly moist while the plant establishes. After that, water deeply when the top few inches of soil begin to dry, aiming the water at the base to help keep leaves dry. A 2-3 inch mulch layer helps moderate soil temperature and reduces watering swings in summer heat.
Feed during the growing season according to your preferred rose program, and keep flowers coming by deadheading spent blooms back to a strong outward-facing bud. Prune in late winter or very early spring to shape the plant, remove dead or weak canes, and encourage vigorous new flowering wood. In colder parts of its range (about USDA Zone 6), add extra mulch at the base for winter protection.
As with many hybrid tea roses, routine care helps prevent common foliar issues. Space plants for airflow, remove fallen leaves, and monitor for pests so you can respond early. Mature plants typically reach 60-72 inches tall with a 24-36 inch spread.