Shallot Biofertilizer: POC Formula for Bulb Quality for Large and Long-Lasting Bulbs

Brebes shallot farmers, have you ever experienced harvesting small bulbs or rapid rotting during storage? This problem often arises due to a lack of micronutrients and natural hormones during the bulbing phase. Shallot biofertilizer is a smart solution to optimize bulb formation and extend shelf life. The POC Formula for Bulb Quality from Biosolution, with a consortium of PGPR, seaweed extract, and humic acid, is specifically designed to stimulate uniform bulb growth. Let's learn the proper application method: dosage, frequency, and best timing.

Why is Biofertilizer Important for Shallots?

Shallots (Allium cepa var. ascalonicum) require balanced nutrient intake, especially during the bulbing phase. Synthetic chemical fertilizers often only provide macronutrients (N, P, K) but neglect micronutrients and growth hormones. As a result, bulbs are suboptimal, susceptible to disease, and have low shelf life.

Biofertilizers contain beneficial microorganisms such as Lactobacillus spp. and Bacillus spp. that act as PGPR (Plant Growth Promoting Rhizobacteria). PGPR produce phytohormones (auxins, gibberellins, cytokinins) that stimulate bulb cell division, enhance nutrient uptake, and suppress soil pathogens. Thus, biofertilizers not only enrich the soil but also strengthen plant resistance.

POC Formula for Bulb Quality: Superior Composition

The POC Formula for Bulb Quality is a liquid organic fertilizer (POC) specifically formulated for the bulbing phase. Its contents:

• PGPR Consortium: Triggers growth hormones and micronutrient availability. Bacteria such as Pseudomonas fluorescens and Bacillus subtilis produce phosphatase enzymes that solubilize phosphorus, and siderophores that bind iron, making it easier for plants to absorb.
• Seaweed Extract: Natural source of cytokinins and micronutrients (Zn, Mn, Fe). Cytokinins stimulate bulb cell division and delay leaf senescence, allowing bulbs to continue enlarging.
• Humic & Fulvic Acids: Nutrient carriers and root stimulants. Humic acid increases soil cation exchange capacity, making nutrients more available. Roots become longer and more branched, improving uptake efficiency.

This combination creates synergy that accelerates bulbing, increases bulb weight by 15–25%, and reduces flower/fruit shedding by up to 30%.

Proper Application of Shallot Biofertilizer

Dosage and Frequency

Recommended dosage: 3–5 ml per liter of water (equivalent to 15–25 ml per 5-liter tank). Application frequency: every 7–10 days, starting when the plant enters the bulbing phase (around 30–40 DAP depending on variety).

Best Application Time

Spray in the morning before 10 AM or in the afternoon after 4 PM. Avoid application during intense sunlight as microbes are sensitive to UV rays. The optimal temperature for PGPR activity is 25–30°C.

Application Methods

The POC Formula for Bulb Quality can be applied in two ways:

1. Foliar spray: Spray the solution over all leaf surfaces until evenly wet. Healthy leaves absorb nutrients faster through stomata.
2. Soil drench: Pour the solution onto the root zone (200–300 ml per plant) to strengthen the rhizosphere.

For maximum results, alternate between both methods. For example, foliar spray in the first week, soil drench in the second week, and so on.

Tips to Maximize Results with Biofertilizer

• Regular application: Do not skip the schedule. Consistency maintains hormone and microbe availability.
• Water pH: Ensure spray water pH is 5.5–7.0. Water that is too acidic or alkaline can reduce microbial effectiveness.
• Mixing with other fertilizers: Avoid mixing with chemical fungicides or bactericides in the same tank. If necessary, allow a 2–3 day interval.
• Soil conditions: Biofertilizers work best in loose soil with sufficient organic matter. Apply lime if soil pH is below 5.5.

Case Study: Successful Brebes Farmer with POC Formula for Bulb Quality

Mr. Karno, a shallot farmer in Wanasari District, Brebes, reported a significant increase in yield after switching to biofertilizer. "Previously, bulbs were small and rotted quickly. After using the POC Formula for Bulb Quality, bulb size became uniform, weight increased, and they could be stored for up to 3 months," he said. He sprayed every 7 days starting at 35 DAP with a dosage of 4 ml/L. Harvest yield: 12 tons/ha from the previous 9 tons/ha.

Advantages of Biofertilizer Over Chemical Fertilizer

Conclusion

Shallot biofertilizer POC Formula for Bulb Quality is the right solution for obtaining large bulbs, optimal weight, and long shelf life. With regular application of 3–5 ml/L every 7–10 days in the morning, you can increase yield by 15–25% and reduce post-harvest losses. Don't hesitate to free consultation via WhatsApp or see the POC Formula for Bulb Quality product for more information. Also get other complete biofertilizers for your plant nutrition needs.