Rephrased News Headline: Transplanting Greenery: Lavish Lava and Complementary Soil
Repotting plants with lava rocks can provide excellent drainage and promote healthy root growth. Here's a step-by-step guide on how to do it effectively.
Preparing Lava Rocks for Use
Before using lava rocks, it's essential to clean them thoroughly. Rinse the rocks to eliminate debris or cleaning agents. For container gardening, opt for smaller, rounded or irregularly shaped lava rocks to prevent soil compaction and root damage. Purchase lava rocks from reputable suppliers specialising in horticultural or landscaping materials. If necessary, clean them by boiling or soaking them in a mild bleach solution.
Layering Lava Rocks in the Pot
Start with a layer of lava rocks at the bottom of the container, taking up about 5-10% of the planter's inside. This layer will create air space and improve aeration. For optimal drainage, use chunky lava rock in this bottom layer.
Next, mix smaller grade lava rocks into the potting medium to enhance drainage and moisture retention balance without overwatering. This approach is especially effective for orchids and tropical plants, as the large lava rocks at the base provide extra aeration while smaller pieces hold some moisture, inviting roots to grow downward.
Choosing the Right Size and Type
When choosing a container, ensure it's appropriate for the plants and application. Rounded or irregular shapes can prevent damage to plant roots, while avoiding sharp edges or protrusions is essential. The container should have a drainage hole to allow for internal water drainage, especially when using lava rocks.
General Repotting Rule
The best time to repot a plant is early spring, before the start of the growth season. Plants need fresh potting soil or a new container every 12 to 18 months, depending on their growth rate. Wait at least two weeks after getting a new plant to give it time to adjust to the new environment.
Signs that Indicate it's Time to Repot a Plant
Slow growth, yellowing leaves, loss of leaves, and roots pushing the plant up and out of the pot are signs that it's time to repot. If the plant dries out faster than usual, it may also need repotting.
Watering the Newly Potted Plant
After repotting, water your newly potted plant, being careful not to overwater it due to the internal drainage provided by the lava rocks. Avoid water pooling on top of the soil and not absorbing.
Fertilizing the Newly Potted Plant
Hold off on fertilizing for about a month after repotting to allow the plant to adjust to its new surroundings.
Commercial Mixes for Convenience and Effectiveness
Consider using pre-formulated mixes containing lava rock for convenience and effectiveness. Commercial mixes like Miracle-Gro’s Tropical Potting Mix already incorporate porous lava rock to help keep the medium lightweight and promote proper drainage for tropical plants.
Remember, simply putting rocks—lava or otherwise—at the bottom of a pot without holes can sometimes trap water above them rather than improve drainage. The key is using lava rock as part of a porous and well-draining potting mix rather than just a gravel layer at the bottom alone.
By following these guidelines, you can ensure optimal drainage and healthy root growth for your plants when repotting with lava rocks.
