5 Prime-Ark Horizon Thornless Blackberry Live Plants – Everbearing, USDA Zones 6-9

Overview

Bring the joy of fresh, homegrown fruit to your garden with the Prime-Ark Horizon blackberry live plant. This exceptional variety is renowned for its high yields and dual-cropping capabilities, providing an abundance of delicious berries. Developed by the University of Arkansas, the ‘Prime-Ark Horizon’ is a primocane-fruiting (everbearing) blackberry, meaning it produces fruit on both first-year canes (primocanes) and second-year canes (floricanes). This unique characteristic ensures an extended harvest season, delivering a generous crop in the summer and a second, equally bountiful crop in the late season. Gardeners will appreciate the thornless nature of these plants, making harvesting a comfortable and enjoyable experience. Whether you’re a seasoned gardener or just starting, the everbearing blackberry plants offer a rewarding and productive addition to any outdoor space.

The Rubus Horizon, as it’s scientifically known, is celebrated for its vigorous growth and adaptability, particularly thriving in USDA Hardiness Zones 6-9. Its robust nature makes it an excellent choice for a wide range of climates, though it shows particular success in the mid to upper South. With this Prime-Ark Horizon blackberry live plant, you’re not just planting a bush; you’re cultivating a source of fresh, flavorful fruit that will enhance your culinary endeavors and provide healthy snacks straight from your garden.

Key Benefits

The ‘Prime-Ark Horizon’ blackberry offers numerous advantages for the home gardener, making it a highly desirable choice for fruit production. Its unique characteristics provide both ease of care and a prolonged harvest.

• Extended Harvest Season: Enjoy fresh blackberries for a longer period. This Prime-Ark Horizon blackberry live plant is everbearing, producing a summer floricane crop and a late-season primocane crop, ensuring a continuous supply of fruit.
• Thornless Canes: Harvesting is a pleasure with these plants. The lack of thorns makes picking berries easy and pain-free, encouraging more frequent enjoyment of your crop. This is a key benefit of the thornless blackberry bush.
• Large, Delicious Berries: The fruit averages 7.8g, with some individual berries reaching up to 10-15g. These large, firm, and flavorful blackberries are perfect for eating fresh, baking, or preserving.
• High Yielding: Expect an abundant harvest from these productive plants. The ‘Prime-Ark Horizon’ is known for its impressive fruit production, maximizing your garden’s output.
• Adaptable to Various Climates: Best suited for USDA Hardiness Zones 6-9, this variety is particularly successful in warmer climates, offering reliability and strong performance.
• Versatile Culinary Use: Fresh blackberries are excellent in desserts, smoothies, jams, or simply enjoyed on their own. Growing a Prime-Ark Horizon blackberry live plant provides a versatile ingredient for countless recipes.
• Vigorous Growth: These plants establish well and grow robustly, providing a healthy foundation for years of fruit production.

Plant Care & Growing Tips

Successful cultivation of your Prime-Ark Horizon blackberry live plant involves understanding its specific needs for sunlight, water, soil, and nutrition. Blackberries generally thrive with ample sun exposure. Plant your ‘Prime-Ark Horizon’ in a location that receives at least 6-8 hours of direct sunlight per day. Full sun is crucial for optimal fruit production and the development of sweet, large berries. While it tolerates some partial shade, too little sun can reduce yields and berry quality. Ensure good air circulation around the plants to prevent fungal diseases.

Watering is critical, especially during the establishment phase and fruit development. Keep the soil consistently moist but never waterlogged. Deep watering once or twice a week is generally better than frequent shallow watering, encouraging deeper root growth. During dry spells or when berries are forming, increase watering frequency. The ‘Prime-Ark Horizon’ prefers well-draining, slightly acidic soil with a pH between 5.5 and 6.5. Amend heavy clay soils with organic matter like compost to improve drainage and fertility. A good quality garden soil enriched with compost will provide the ideal environment for your thornless blackberry bush.

These plants are best suited for USDA Hardiness Zones 6-9, tolerating winter temperatures down to around -10°F (-23°C). In colder parts of its zone, some winter protection might be beneficial, such as mulching the base. Fertilize in early spring with a balanced fertilizer, and again after the first harvest to support the second crop. Pruning is essential for maximizing yield and plant health. Remove floricanes (canes that have fruited) after their harvest. Prune primocanes (first-year canes) in late winter or early spring to encourage branching and fruit production for the upcoming season. Regular pruning also helps manage the size and shape of your everbearing blackberry plants.

Size & Details

These 5 Prime-Ark Horizon blackberry live plant starters are typically shipped as plug plants, ready for transplanting into your garden or larger containers. At maturity, these vigorous bushes can reach heights of 5-8 feet and spread equally wide, depending on pruning and growing conditions. They have a medium to fast growth rate, allowing you to enjoy fresh berries relatively quickly after planting. The ‘Prime-Ark Horizon’ is known for its large fruit size, averaging 7.8 grams per berry, with many individual berries often reaching an impressive 10-15 grams. These robust plants are designed for long-term productivity, providing a reliable harvest year after year. For best results, allow adequate spacing between plants to ensure good air circulation and light penetration, which is vital for healthy growth and prolific fruit set of the Rubus Horizon.

These plants are shipped ready to be planted in your outdoor garden. They are perennial, meaning they will return each year, providing a continuous supply of delicious fruit for many seasons. The extended harvest period, thanks to its primocane-fruiting nature, means you’ll have fresh blackberries from summer well into the fall. Proper care and pruning will ensure these plants remain healthy and productive, making them a valuable addition to any home orchard or edible landscape.

Frequently Asked Questions

• Q: How big do these Prime-Ark Horizon blackberry plants get? A: At maturity, a Prime-Ark Horizon blackberry live plant can typically reach heights of 5-8 feet and spread similarly wide, depending on pruning and growing conditions.
• Q: Is this an indoor or outdoor plant? A: The ‘Prime-Ark Horizon’ blackberry is an outdoor plant, best suited for garden cultivation in USDA Hardiness Zones 6-9. It requires full sun exposure to thrive and produce fruit.
• Q: How much sunlight does the Prime-Ark Horizon blackberry need? A: For optimal growth and fruit production, this thornless blackberry bush requires at least 6-8 hours of direct sunlight per day. Full sun is highly recommended.
• Q: Is this plant easy to care for, especially for beginners? A: Yes, the ‘Prime-Ark Horizon’ is considered relatively easy to care for, especially due to its thornless canes. With proper sunlight, water, and annual pruning, beginners can successfully grow these everbearing blackberry plants.
• Q: What condition will the plants arrive in? A: These are typically shipped as healthy starter plug plants, ready for immediate transplanting into your garden or larger pots.
• Q: When is the best time to plant Prime-Ark Horizon blackberries? A: The best time to plant these blackberries is typically in early spring after the last frost, allowing them ample time to establish before the growing season.
• Q: Will this blackberry variety survive winter in my zone? A: The ‘Prime-Ark Horizon’ is hardy in USDA Hardiness Zones 6-9, meaning it is well-equipped to survive winters within this range. In colder parts of Zone 6, some mulching for protection may be beneficial.
• Q: How long until these plants start producing fruit? A: As primocane-fruiting plants, you can expect some fruit production on the first-year canes (primocanes) in the late season of the first year after planting, with a larger floricane crop in the summer of the second year.
• Q: What type of soil is best for Rubus Horizon? A: This blackberry variety thrives in well-draining, slightly acidic soil with a pH between 5.5 and 6.5. Amending with organic matter is beneficial.
• Q: Can I grow this Prime-Ark Horizon blackberry live plant in a container? A: Yes, ‘Prime-Ark Horizon’ can be grown in large containers (e.g., 15-20 gallon) provided they have excellent drainage and the plant receives adequate sunlight and water.