Blue and pink blooms on the same hydrangea ?
Lydia Lydia
6 years ago
last modified: 6 years ago
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How to turn pink into a BLUE hydrangea
Comments (2)I tablespoon of aluminum sulphate in one Gallon of water...make sure all the crystals are dissolved... before the alum. sulphate application, make sure you water the hydrangea plant well..it is ok if it is dripping wet.. pour the al. sulphate solution right at the base of the plant, do not let any of the solution to touch the foliage or the leaves will get burn spots.. one gallon solution is enough for a mature hydrangea plant (3' X 3').. let the solution sit in the soil for an hr and water the plant lightly and briefly to wash off any extra solution sitting in the soil that could burn the roots... you should not apply the solution more than once every two weeks...you can apply two applications in a month and not risking to kill the plant...much more often than that, i dont know, but i won't reco it.. btw - the pink blooms already blooming now WILL NOT chg to blue even after the al. suphate solution.. the sulphates will make the soil more acidic and future bloom colors will chg accordingly.. so if you have a rebloomer like endless summer now and it is beginning to show the pink blooms, the sulphate application will not chg the pink blooms now..but the new blooms later in the season will chg to blue if the pH is low enough// if you dont have a rebloomer and all the buds are set already, an al. sulphate application would not chg the color for the blooms this season.. for me - I don't do al. sulphate applications much because it does poison the soil to a certain degree - if you have a Rhodi or Azalea nearby, they may not appreciate the extra aluminum in the soil...whenever I do the sulphate application, i do one in spring - when the flowerbuds are forming - april in that case...and another one in July for the later blooms...twice is enough for me to keep my endless summer to bloom in a brilliant blue color... have fun.....See MoreWhy is my Nikko Blue Hydrangea pink?
Comments (1)It is always possible the plant was mislabeled, but generally even an acid-lovers fertilizer formulation is not sufficient to change soil pH significantly if your soil is skewed towards the alkaline and/or heavily buffered (ie. clay soils). Repeated annual applications may help, but I'd try agricultural sulfur or aluminum sulfate and a good wood or sawdust mulch. An added note: it sometimes takes several seasons before soil chemistry is altered enough to produce the flower color you desire and Nikko tends to be more of a pale blue under the best of circumstances....See MoreHydrangea blooms not turning pink
Comments (6)Plain ole mulch and organic compost in Spring will be great for them. Say, a layer 1/4 to 1/2" of compost around each shrub. You can also use 1/2 cup to 1 cup of cottonseed meal. A balanced slow-release fert like Osmocote 10-10-10 will also be fine. You can add 3-4" of mulch up to the drip line too (a little further if it is windy). To turn the flowers pink, you need to regularly amend with garden lime available at nurseries. Apply according to the label's directions and then water them. To turn them blue, add aluminum sulphate instead (or try greensand, iron sulfate or garden sulphur). Apply these according to label directions and then water them. Do not exceed dosages by a lot as sulphur based compounds can burn the small roots. See if you can also invest in a soil pH kit so you can measure the changes in soil pH. These are commonly available at plant nurseries but I am not sure how the stock will be near the end of the growing season. If everyone around you is out, wait until Spring or mail order from someone you like. Fertilizers should be applied thru the end of June so the plant will go dormant in the Fall and not stay in growth mode. This does not apply to the lime and acidifying soil amendments. You can also use some "weak" fertilizers like liquid seaweed, liquid fish or coffee grounds but again, stop using them in July-ish....See MorePink Hydrangea Flowers Losing Color Fast After Bloom & Turning Yellow
Comments (2)As the hydrangea blooms get old, they start a series of color changes that add shades of green, pink, etc to the blooms until they end brown. The blooms "stay" in their original color for several weeks (month? more or less). The exact color and duration of changes is different but, it looks like your blooms look like they are in a nice shade of green. Most of mine started this a while back ago since hydrangeas bloom early here. I leave the spent and brown-ed out blooms on the plants during winter. They typically fall off on their own during winter but, you can always cut the little string that connects the bloom to the stem (the string is called the petiole). Doing this is called deadheading (not the same as pruning) the blooms. The oakleaf and paniculata spent blooms are some that tend to stay "on" into late Spring sometimes. I am not sure why they do not fall as fast as mophead blooms do but I notice the mopheads blooms' petiole seems thinner....See MoreLydia Lydia
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