PON (Product of Nature) is an alternative growing medium for plants, offering a distinct approach to cultivation compared to traditional soil mixes. This soilless substrate provides a stable and clean environment for plant roots, contributing to overall plant health and simplified care routines.
Understanding PON for Plants
PON is a mineral-based substrate composed of pumice, zeolite, and lava rock. Each component contributes unique properties. Pumice, a porous volcanic glass, provides aeration and water retention. Lava rock, also volcanic, adds porosity, aids drainage, and retains moisture and nutrients. Zeolite, a natural volcanic mineral, absorbs and releases water and nutrients, and helps buffer pH levels.
This combination creates a medium with an ideal air-to-water ratio, beneficial for root health. Unlike organic soil, PON is inert, meaning it does not break down over time, maintaining its structural integrity and air-permeable nature. Many PON formulations also include a slow-release fertilizer that provides initial nutrients to plants.
Advantages of Using PON
Plants grown in PON experience several benefits. Its coarse, porous structure ensures excellent aeration and superior drainage around the roots. This prevents root rot by providing ample oxygen and avoids waterlogging that can harm root systems.
The mineral components, particularly zeolite, act as a buffer, absorbing and releasing water and nutrients as needed. This ensures consistent nutrient delivery and reduces the risk of over-fertilization. The inorganic nature of PON also reduces common soil pests like fungus gnats, which rely on organic matter. PON provides stable physical support for plant root systems.
Using PON with Your Plants
Transitioning plants to PON requires minimizing stress. First, gently remove the plant from its original soil, cleaning all soil particles from the roots. Running roots under lukewarm water helps dislodge stubborn soil; trim any dead or rotted roots. Before potting, rinse the PON thoroughly to remove fine dust or sediment that could clog pores.
To pot, place a layer of rinsed PON at the bottom of the container, then position the plant and fill around the roots with more PON, ensuring the plant is stable without compacting the medium. Initial watering settles the PON around the roots. For plants in self-watering pots with a reservoir, fill the reservoir and allow the PON to wick up moisture. If using a pot with drainage holes, top-water until water drains freely, then allow the medium to dry out partially before the next watering.
Most PON products come with a slow-release fertilizer that can last for several months. After this initial period, or if using a fertilizer-free PON, supplemental feeding with a complete hydroponic fertilizer is necessary. Fertilize according to product instructions, often with diluted solutions during regular watering, adjusting frequency based on plant needs and growth.
Tips for Success with PON
Plants often experience an adjustment period when moved from soil to PON. During this time, some leaf yellowing or wilting can occur as the plant develops new “water roots” adapted to the semi-hydroponic environment. Consistent humidity assists this transition.
Regularly monitoring the water level in the reservoir or checking the moisture of the PON is important. Allow the reservoir to dry out for a few days between refills, known as a “dry phase,” to ensure roots receive adequate oxygen. Periodically flushing the PON with plain water helps prevent the buildup of mineral salts from fertilizers.
PON is a long-lasting medium that does not compact, reducing the need for frequent repotting. It can be reused after cleaning. Many plants sensitive to overwatering or root rot, such as Hoyas, Philodendrons, Monsteras, and some orchids, thrive in PON. Patience and observation are beneficial for long-term success.