At this time of year, retailers of bedding plants despair to see plants wither at the point of sale due to lack of attention and water. Nurseries and plant growers have found that with the use of a foliar fertiliser containing Silicon (Si) the plants ability to withstand stress is enhanced, improving visual appearance and shelf life. Silicon deficiency is commonly found in plants grown in soil-less growing systems such as peat or coir and is a frequent cause of plants suffering stress at point of sale due to heat or lack of water. UK Company, Solufeed, recommends a weekly root drench of their product called Signal throughout the growing season. Signal is a water-soluble potassium silicate. Solufeed.
Intermag Al, Poland, have recently developed a water soluble solid silicon biostimulant called Optysil Ultra, following their successful liquid product Optysil. The new solid, microgranulated product contains 20% (w/w) of silicon and has a pH value of 7.7. The company says that it can be used as a stand alone product or as an ingredient for formulations of fertilizers or other biostimulants. https://intermag.eu/crop-farming/products/stimulants-and-activators
Interested readers are invited to look at the main Hortcom theme ‘Silicon in Agriculture’.