We gave strawberries and blueberries (and blackberries, etc.) from the start. Strawberries actually aren't an allergy risk, per se, but they can sometimes cause a rash in the mouth or face because they are quite acidic (kinda like if you eat too much pineapple, it can make your tongue a bit sore and raw feeling). Technically, babies can be allergic to anything. My friend's son is allergic to tomatoes and aubergines. But berries are totally fine from the start. My daughter loves them. We once went through nearly a kilo of strawberries in about 4 days!