For semi-erect cultivars, space plants 5 to 6 feet apart. Space erect cultivars 3 feet apart. Space trailing varieties 5 to 8 feet apart. Space rows about 8 feet apart.
Plant shallowly: about one inch deeper than they were grown in the nursery.

The best time to plant blackberries is late fall through early spring.

Blackberries can be propagated through leafy stem cuttings as well as root cuttings. If you want to propagate lots of plants, leafy stem cuttings are probably the best way to go. This is usually accomplished while the cane is still firm and succulent. You’ll want to take about 4-6 inches (10-15 cm.).

Yes, you can grow blackberries in a pot, take care, it may outgrow the pot at some point.

1 inch of water per square foot per week.

Blackberries should be fertilized infrequently.

Blackberries will bloom in the summer.

the ones that are dark black in color and look quite plump. If the berry is a light purple or red or is quite firm, it may need a few more weeks to ripen.

Pick only berries that are fully black. …
Once blackberries start to ripen, they must be picked often—every couple of days.
When picking, keep the central plug within the fruit (unlike raspberries).
Harvest during the cooler parts of the day.

Store berries in paper towel-lined sealable container, with layers of paper towels between each layer of berries. Keep the lid slightly open to allow excess moisture to escape. Place in the refrigerator to store.

Blackberries are a fruit.

Blackberries grow well with borage, lemon balm, bee balm, mint, thyme, and chives, rose bushes, beans, and peas.

Blackberries can help reduce inflammation and prevent many diseases, including cancer.

Remove the canes from their supports and place the canes on the ground. Cover with a heavy layer of mulch. In the early spring, before new growth emerges, lift the canes and reattach them to the trellis.