I will tell you about how to save the harvest if the strawberry cores suddenly turn black, or just dark. There are really very different situations, and therefore you should understand that this is not the norm if really strawberries, namely, its flower began to turn black, as a rule, it happens from the middle and more. Of course, there can be many all possible terrible and not the best reasons for this to happen. But we will not even discuss them, but we will definitely talk about how to get rid of or simply overcome this barrier, if you can call it that.
So, let's start with phosphorus and boric acid, boric acid is sold in bags, we pour a very bag into a 10 liter bucket and add garden phosphorus there however, about 200 grams, we mix all this and in the end we get an extremely good and undoubtedly wonderful composition with which you should water the strawberries exactly in the evenings, throughout the week and every other day, but only after abundant watering, which, again, was very good, and the strawberries were properly soaked wet soil.
So, if we talk about the most basic recommendations for growing strawberries, then here you need very little concentration and attention, you do not need to run and to look into each flower, strawberries are very good just to be in the sun and it is imperative that they be watered as often and as much as possible, almost the same as with raspberries.
But raspberries are ready to delight you with their berries much longer, but strawberries will not please you several times a season.