How to grow Blueberry (Northern Highbush)
in the US

Right then, blueberries. Proper cracking fruit, these are. Takes a bit of patience, mind, but the taste of your own berries, fresh picked from the bush, well, it's just something else, isn't it? They might be a bit of a medium difficulty plant, but once they're settled on your plot or in a big pot, they'll give you years of lovely fruit.

Sowing

Now, starting blueberries from seed, that's a long game, a good two years before you see any proper fruit, about 730 days to be precise. If you fancy a go, sow your seeds shallow in pots of acidic potting mix in late winter or early spring, like February to April in warmer zones 8-10, or April to May if you're in cooler zones 3-4. For zones 5-7, you're looking at March, April, or May, and you can also sow in the fall, September or October. Keep the potting mix moist and warm, around 60-70°F (15-21°C) if you can manage it. It’ll take a while for them to sprout, so don't give up hope.

Growing on

Once your seedlings are big enough to handle, or if you've bought young plants, you'll want to get them growing on. They need acidic soil, so either dig in plenty of ericaceous compost or grow them in large containers with it. Space them about 4-6 feet (1.2-1.8 meters) apart if planting in the ground, making sure they get plenty of sunshine. They're pretty hardy, but protect young plants from late frosts until they're properly established. No need for staking or anything like that, they'll grow into sturdy bushes.

Looking after it

Blueberries love consistent moisture, so keep them well-watered, especially when they're fruiting. Mulch around the base with pine needles or bark chips; this helps keep the soil acidic and holds moisture in, you know. Feed them with an ericaceous fertilizer in spring, just to give them a good boost. Pruning is mostly about removing old, unproductive wood in late winter to keep the bush healthy and open.

What goes wrong

Birds are the biggest thieves, they’ll strip your bushes clean if you let them, so netting them when the berries start to ripen is a must. Watch out for blueberry maggot, which can make the fruit mushy, and mummy berry, which turns them into shriveled, hard things. Aphids can also be a nuisance, but a good blast of water or some insecticidal soap usually sorts them out. Companion plants like thyme or chives can help deter some pests.

Harvest

Your berries will be ready to pick from July through to September, depending on the variety and your local climate. They should be a deep blue and come away easily from the stem. Don't rush it, an unripe berry isn't half as sweet! Pick them gently, and if you get a proper glut, they freeze brilliantly, or you can just pop them in the fridge for a week or two.