Berries are not just nutritious and beautiful  but also an excellent companion plant when used in the right spot, like low blueberry bushes around trees, strawberries as a ground cover and gooseberries as a pollinator. Raspberries should be planted with caution, many plants wont like having them around due to their spreading nature.

Companion Planting is an integral part of permaculture and a holistic approach to gardening where you plant different crops in proximity for maximising the use of space, providing nutrients, shade or support, increasing crop productivity, attracting beneficial insects, pest control / repelling pests, pollination or providing a space for beneficial creatures. The concept is an ongoing process of living and learning with nature and increasing biodiversity to support a sustainable Eco system.  Below is a quick reference guide for companion planting with berries:

Berries

View all Berry Growing Guides

Name	Good Companions	Not a Companion
Blueberries	Oak trees, pine trees, strawberries, clover, bay laurel, dewberries, yarrow.	Tomatoes.
Blackberry	Grapes, garlic, raspberries (not too close), mint, lemon balm, chives, hyssop, strawberries, apple trees, elderberry tree, stinging nettle and other nitrogen fixing plants, sunflowers.	Peppers, tomatoes, eggplants, potatoes.
Currants	Marigold, yarrow, nasturtiums, chamomile and other flowers or herbs.
Gooseberry	Basil, tomatoes, broad beans, flowers, herbs and low ground covers.
Mulberry	Grapes.
Raspberry	Rue, artemisia, garlic, onion, oats, tansy, yarrow.	Young berries, potatoes and beets.
Strawberries	Borage, lettuce, spinach, sage, beans, spring onions, thyme (as a border).	Cabbages, cauliflowers, Brussels sprouts gladioli, tomatoes, broccoli, garlic, mint, rosemary.

Other Companion Planting Categories:

HerbsFlowersTreesBerriesVegetablesFruitMushrooms