Hydrangea soil

ideal soil characteristics

Easy

Soil for hydrangeas

If we want to grow hydrangeas in the garden, we need to consider that their ideal soil must remain moist for a long time but not encourage waterlogging. Ideally, it should be moderately clayey and rich in organic matter.

Sandy, stony, or overly clayey and compact substrates should be avoided. It is advisable to prepare the soil in advance by working it thoroughly and adding amendments (manure) to make the substrate more suitable.

If we don't have the time, we could remove a large amount of soil and replace it with one more suitable for acid-loving plants, supplemented with a good dose of organic fertilizer. In pots, the ideal approach is to use specific substrates for acid-loving plants with the addition of draining materials such as perlite, expanded clay, or pumice.

Fertilization

Hydrangeas require a good amount of soil amendment. The best time to provide it is before the end of winter. Ideally, spread it around the plant and then incorporate it into the soil with light hoeing.

This will make the soil more alive and rich in microorganisms (which work in symbiosis with the roots) as well as more capable of retaining the right amount of water.

At the end of the cold season, we can also apply a slow-release granular fertilizer for acid-loving plants or one specifically designed for hydrangeas, distributing it around the plant. It should be mixed into the soil to promote mineralization and prevent leaching.

Supplements, soil acidity, and flower color

Not all hydrangeas have the ability to change the color of their flowers. For example, white-flowered ones and some red varieties cannot do so. Moreover, certain varieties can achieve a more beautiful shade of blue than others, and the same applies to some varieties that look very beautiful only in pink.

If our soil is alkaline, it will be difficult to achieve beautiful blues. Often, despite great efforts, the result is a faded light blue, multicolored flowers, or a somber purple. The advice therefore is to lean toward the color that is most naturally suited to the plant in that particular soil. If it is alkaline, try to enhance the pink. If we have acidic soil, try to achieve a beautiful intense blue.

A pH of 6 is generally sufficient to obtain blue flowers. However, to achieve a very intense blue, it is essential to provide the plant with aluminum sulfate (it is the absorbed aluminum that gives the flower its color). And it is precisely this element that becomes insoluble and therefore inaccessible to the plant in soils with a pH above 6.

It is sold commercially under the name "bluing agent." Traditionally, to achieve a color change in hydrangeas, it was recommended to insert nails or iron filings into the soil. This method is not very effective if the soil does not have the right pH. Only by modifying the pH will we make both iron and aluminum more available to our plant.

Learn the art and put it aside

Manual use. A moderate pratice of the activities descripted in this manual create the common sense. The common sense cames from experience. This site is made with Love to improve pratical and speculative ability and for this reason it contributes to the humanity development. All content is written by humans, no AI was harmed in the creation of this content.