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https://homesteadgardenblog.wordpress.com/tag/triple-crown-blackberry/#:~:text=The%20all%20capital%20letter%20names%20are%20the%20weather,more%20years%20before%20I%20make%20a%20final%20judgement.
https://www.gardenerdirect.com/buy-plants/863/Blackberry-Bushes/Triple-Crown-Thornless-Blackberry
However, the data collected so far indicates that Triple Crown will need 500-800 chill hours to attain its maximum level of fruiting productivity (please see chart/map below). …
https://www.houzz.com/discussions/1462004/triple-crown-blackberry-problem
However, what kindwood says about chill hours is correct, and you might not get quite enough for Triple Crown to produce reliably, as it needs more in the 800-1000 hour range. I do wonder what you mean, though, by "wound" the canes on a trellis.
https://homesteadgardenblog.wordpress.com/tag/triple-crown-blackberry/
The Triple Crown Blackberries need about 500-800 chill hours which might explain why they have not emerged as strongly as my other berry plants. I have been told to be patient and wait a couple more years before I make a final judgement.
https://growingfruit.org/t/blackberries-for-low-chill-gulf-coast/13536
But my triple crown had major problems coming out of dormancy and flowering. I’ve seen various chilling hours listed for TC, from 300-400 all the way to 800+. I tend to think it’s closer to the higher end. I rooted some and planted at a family member’s home who probably receives 400-500.
https://www.gurneys.com/product/triple_crown_blackberry
They're the best-tasting blackberry we've tried and have a wonderfully complex sweet flavor with no hint of the acidic tang that's present in other varieties. Triple Crown is also thornless—so picking is easy. Triple Crown begins to ripen in mid-July. The plants grow into 12- 15 ft., semi-erect canes with dense foliage that offers protection ...
https://www.smartgardener.com/plants/1003-blackberry-triple-crown-thornless/overview
Outdoor Growing Temp. 45°F - 85°F. Min Outdoor Soil Temp. 35°F. In mild climates Blackberry plants can be planted any time they are dormant from late autumn to early spring. In colder climates they are usually planted in spring. Of course the soil should not be frozen, so the temperature should be above 32˚ F.
https://anoregoncottage.com/triple-crown-thornless-blackberries/
Triple Crown blackberry is named for its three attributes; flavor, productivity and vigor. It's also disease resistant and grows huge berries. Grow in zones 5-9, though they have insufficient cold hardiness for many northern regions except in tunnels. The recommended spacing is 5 ft apart (ours are only 3-4 ft. apart and obviously do well).
http://ediblelandscaping.com/products/berries/Blackberries/
Arapaho Thornless Blackberry - Rubus spp Apache Thornless Blackberry - Rubus spp; Arapaho is the earliest ripening thornless variety. Lots more to pick at once because it ripens its fruit in a 4 week period. Can be planted farther south. Arapaho needs only 400-500 chill hours.(hours with temperatures below 45 degrees F) Plant Patent # 8510.
https://www.monrovia.com/triple-crown-blackberry.html
Triple Crown Blackberry. Rubus x 'Triple Crown' SKU. 07415. A self-fruitful, free-standing, thornless shrub that produces one crop of fruit per year. Clusters of white, 5-petaled, rose-like flowers in spring give way to firm, glossy blackberries of excellent eating quality that mature in summer.
https://www.houzz.com/discussions/2945572/prime-ark-freedom-chill-hours
Your reported150 chill hours is the lowest I've seen for any blackberry variety. Since I'm down near the Pacific Coast in San Diego County with as low as 100-200 chill hours, the Prime Ark Freedom Blackberry is the one that I'll have to try. Based on your 150 chill hour feedback, I've gone ahead and ordered 4 of 'em.
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