Twelve years ago I bought two baby blue hydrangeas which turned pink within two weeks. I replanted them in ericasious compost & watered them with Aluminium sulphate & they turned bright blue. Two years ago they had become too large for the pots so they were planted in the ground & no matter how much AS they get plus coffee grounds they're now a mixture of pink & purple. I've also had hydrangeas turn pink although they were immediately planted in ericasious compost. I have a total of seven 'blue' hydrangeas but only three are actually still blue. I wish it were as easy as it looks in your video.
I liked the video because it was a Lab experiment. However, turning soil acidic from Alkaline takes some doing. I tried Aluminium Sulphate solution and poured it around the roots. No Luck. Maybe my backyard is too alkaline. However, one of my friends took a handful of the Al Sulphate powder and sprinkled around the base in spring. Come flowering time, the flowers were blue (not purple). I am going to try this with a little more than a handful of AL sulphate and dig up the base. Waiting for flowering time.🤞🤞🤞🤞🤞🤞
I had no idea that the color of the flowers can still change even after they have fully opened up! By the way, you might want to check the pH of your soil first. That way, you can have a much better idea as to how much and how long you should be applying the chemicals for your Hydrangeas. As you say, it will take some time depending on your soil. Naturally very alkaline soil might just be not worth the effort and you might be better off growing them in containers where it is much easier to control the soil pH.
Use of peat moss is terrible for the environment because of the destruction caused in sourcing it. Please use some other kind of acidic (ericaceous) compost!
Hello, this is Algae. You left an interesting question. I leave an answer to your question here. According to some studies, a temperature condition of 11-18℃ and a short day-length of 8 hours are required for the formation of flower buds of hydrangea. Unfortunately, I could not find any information on how long these conditions should be maintained. However, I was able to get an indirect hint by using the period of providing fertilizer. It is recommended to reduce or limit fertilizing hydrangeas during the period of flower bud formation. This period is about 1-2 months, and it is expected that the temperature condition of 11-18℃ should be maintained for 1-2 months. I hope I have solved your curiosity. Have a nice day :)
@@ananda_krishnan_r you are right. In tropical regions, it is difficult for hydrangeas to naturally bloom. If you have a special temperature control facility or equipment, it will be possible to challenge.
