Blackberry : Olallie

Large, shiny, firm black berry that is sweeter and less tart than others

Spring Bearer. Vigorous grower, very productive. This berry is a great fresh treat and is perfect for jams and desserts. Ripens late-May to early-July. 2 year old plant. Developed in 1935 at the University of Oregon a cross between a Loganberry and a Youngberry, two cane berry hybrids themselves.

Rosaceae Rubus fruticosus

This is an example of the timeline you would see based on your growing conditions.

Blackberry: Trailing Blackberries

Olallie

Trailing blackberries are vigorous, crown forming, require a trellis for support, and are less cold hardy than the erect or semi-erect blackberries. Trailing Blackberries are actually a cross between blackberries and raspberries.

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Basics

Ease of Growing: Easy
Grown as: Perennial
Growing Habit: Vine
Hardiness: Hardy

Plants are pretty hardy and can grow as far north as Alaska. Since they flower late, their flowers aren't damaged by late frost, either.
Crops: Spring Transplant, Fall Transplant
Growing Season: Short, Long
Cultivar Type: Extra Early
Growing Conditions: Cold, Cool, Warm, Hot

They grow in every state in the United States so they're fairly adaptable. Cane berries are versatile and hardy in the coldest climates where other fruits fail.
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.
Start Indoors: No
Start Outdoors: No
Light: Part shade (Cold, Cool, Warm, Hot)

Blackberries will tolerate some shade, though they won't be as productive as when growing in full sun

Sun: min. 6 hours daily (Cold, Cool, Warm, Hot)

Blackberries are most productive when growing in full sun.
Water: Moderate

Blackberries are naturally quite drought tolerant (I have been amazed at their ability to survive months without water), but won't produce much fruit if they aren't given plenty of water during their budding and growth period. Lack of moisture when fruiting will result in smaller fruit that may not ripen properly. Water is also important after fruiting for the production of replacement shoots. Give the plants at least 1” of water per week or more if necessary.
Feeder: Heavy

Blackberries are very productive plants and do best in fertile soil. They can occupy the same soil for 15 years, so the ground should be amended heavily before planting.
Suitability: Drought tolerant, Tolerates light frost, Tolerates hard frost, Partial shade, Needs lots of space
Small Gardens?: No
Containers?: No
Attracts beneficial insects?: Yes
Color: Black
Fruit Size: 0.5 - 1.5"
Plant Height: 72.0 - 90.0"
Plant Diameter: - "
Hardiness Zone: 8-11
Disease Resistance
Taste Profile: Sweeter and less tart than others.
Rotation Group: Perennial

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Plant Guide

Blackberry : Olallie

Large, shiny, firm black berry that is sweeter and less tart than others

Olallie

Basics