A Detailed Guide to Preparing Potting Soil for Gardenias

Flowers & Gardening Jan 1, 1970 0 views

The reason preparing potting soil for gardenias attracts so much attention from flower growers is that the gardenia, as a southern flower, prefers slightly acidic soil, and many northern growers find gardenias hard to keep because both their soil and water tend toward alkaline. It is precisely for this reason that we hope...

For preparing gardenia soil, to give the soil a certain acidity we can mix in some humus soil, but this is meant for growers who have the conditions, for example, if a grower has these materials on hand, they can mix in some leaf mold, pine needle soil and the like.

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And if you do not have these resources on hand, then you can consider growing them in sandy soil, which is not impossible. Later on, we can compensate for the soil's alkalinity by watering with rice-washing water or water mixed with vinegar to strengthen the acidity of the potting soil.

Below let us look at what soil preparation schemes flower growers have. The following soil mixes were selected by the editor based on feedback from growers who keep gardenias in relatively good condition, for growers' reference.

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1. Seven parts river sand to three parts soil.

2. Use sandy soil directly.

3. Perlite:vermiculite:peat soil:garden soil mixed at 1:1:4:1.

4. Furnace ash slag (good drainage, good aeration, widely available) + pine needle soil (humus, acidic, retains water and nutrients) + old potting soil. A mixed soil.

The four soil preparations above may not meet growers' needs. No matter, let us go over the core of soil preparation once more. First, the gardenia likes fertile, well-drained, acidic light clay loam, and it also tolerates drought and poor soil.

Organic media are generally acidic, so mixing these media into the soil can reduce alkalinity and provide a certain fertilizing effect. Garden soil, meanwhile, can maintain a certain stickiness, which benefits root growth. Seeing this, what thoughts do growers have? That's right, whether it is leaf mold, pine needle soil, or even peat and such, they all belong to organic media. Now growers understand how to prepare the soil, right? As long as the soil texture is loose, just mix in more humus soil and pine needle soil.

The reason we need to keep the gardenia's soil, or later watering, on the acidic side is that soil, water and fertilizer containing alkali will block the gardenia's absorption of iron, thereby affecting the formation of chlorophyll, which leads to withered branches, scorched leaves, and even death. So besides treating the soil mix, for later watering we can consider using fermented rice-washing water diluted with water, or mix some vinegar into the water. Some growers also report that mixing some beer into the water works very well.

Let us talk about the ratio issue. In the early stage we advocate diluting with a large proportion of water, as this is the safest. Later, as the gardenia settles into its pot, we can adjust the ratio appropriately according to the plant's growth.

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A Detailed Guide to Preparing Potting Soil for Gardenias

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