Shallot Biofertilizer: POC Formula Bulb Quality Application Schedule for Maximum Yield

Shallots are a leading commodity in Brebes that heavily depend on bulb quality at harvest. Unfortunately, many farmers still rely on synthetic chemical fertilizers that suppress soil microbial populations and cause bulbs to rot easily during storage. This is where shallot biofertilizer plays an important role. POC Formula Bulb Quality from Biosolution is an organic solution that not only boosts bulb growth but also improves post-harvest storage life. This article will thoroughly discuss the application schedule of POC Formula Bulb Quality per growth phase so you can harvest large, uniform, and long-lasting bulbs.

Why POC Formula Bulb Quality is Effective for Shallots?

POC Formula Bulb Quality is not just an ordinary liquid fertilizer. This product is specifically formulated for the bulbing phase with three synergistic main components:

PGPR Consortium (Plant Growth Promoting Rhizobacteria)

The consortium of rhizosphere bacteria such as Bacillus spp. and Pseudomonas spp. in this product triggers the production of natural growth hormones (auxins, gibberellins, cytokinins) and increases micronutrient availability. PGPR also produces antimicrobial compounds that protect roots from soil-borne pathogens like Fusarium causing wilt.

Seaweed Extract

Rich in natural cytokinins and micronutrients (Zn, Mn, Fe, B) essential for bulb cell division. Cytokinins stimulate lateral bulb formation, increasing the number of cloves per bulb and improving size uniformity.

Humic & Fulvic Acids

Act as carriers that bind macro and micronutrients, increase soil cation exchange capacity, and stimulate fibrous root development. Healthy roots with large surface area absorb nutrients more efficiently, especially during the critical bulbing phase.

These three components work together to synchronously accelerate the bulbing phase, increase yield per plant by 15–25%, reduce flower/fruit drop by up to 30%, and extend post-harvest storage life.

Application Schedule of POC Formula Bulb Quality per Growth Phase

Application of shallot biofertilizer must be adjusted to the plant's growth stage. Here is the application schedule guide for POC Formula Bulb Quality that has been tested in Brebes fields:

Early Vegetative Phase (0–14 DAP)

In this phase, the main focus is root and leaf formation. The first application is done when plants are 7–10 days after planting (DAP). Mix 3–5 ml of POC Formula Bulb Quality per liter of water, then spray onto all plant parts (foliar spray) or drench onto the root zone. Apply in the morning before 10 AM for optimal absorption and to avoid evaporation. Repeat every 7 days.

Late Vegetative Phase (15–30 DAP)

Entering the third week, plants begin to form tillers. In this phase, the dosage can be increased to 5 ml per liter of water. Application remains every 7–10 days. PGPR will continue to boost vegetative growth while suppressing pathogen development in the rhizosphere. Ensure even coverage on all leaf and stem surfaces.

Bulbing Phase (31–50 DAP)

This is the critical phase. Bulbs begin to enlarge and accumulate food reserves. Application of POC Formula Bulb Quality in this phase is crucial. Spray at a dosage of 5 ml per liter of water every 7 days. Seaweed extract and humic acids will promote translocation of photosynthates to bulbs, maximizing bulb size and increasing dry weight. Do not miss applications at 35 DAP and 42 DAP.

Maturation Phase (51–60 DAP)

In this phase, plants begin to dry leaves and bulbs are ready for harvest. Stop fertilizer application 2 weeks before harvest to prevent residues and ensure bulbs are fully mature. If there are signs of nutrient deficiency, a final application can be done at 50 DAP with a low dosage (3 ml/liter).

Application Tips for Optimal Results

• Application time: Morning (06:00–09:00) when stomata are wide open and temperatures are still low. Avoid application during rain or strong wind.
• Spray volume: 400–600 liters per hectare depending on plant density. Ensure all plant parts are wet, especially the underside of leaves.
• Combination with base fertilizer: POC Formula Bulb Quality can be combined with manure or compost. However, do not mix with alkaline chemical fertilizers (e.g., lime) as it can reduce PGPR viability.
• Storage: Store the product in a shaded place at room temperature. Avoid direct sunlight.

Advantages of POC Formula Bulb Quality for Brebes Farmers

Brebes shallot farmers face main challenges: small bulbs, lack of uniformity, and rapid rotting during storage. By adopting shallot biofertilizer like POC Formula Bulb Quality, the following advantages can be achieved:

1. Bulb weight increases 15–25%: Trial results in Brebes fields show significant increase in weight per plant.
2. Flower/fruit drop reduced by 30%: Natural hormones from PGPR and seaweed extract maintain fruit stability.
3. Longer storage life: Humic acids help form a natural wax layer on bulbs, reducing water loss and fungal attack.
4. Safe for organic certification: Product is organically certified, suitable for strict export markets.

Conclusion

Shallot biofertilizer POC Formula Bulb Quality is the right solution to increase the quantity and quality of shallot harvests. By following the proper application schedule from early vegetative to bulbing phases, farmers can harvest large, uniform, and long-lasting bulbs. This product is easy to apply (foliar or drench), organic, and scientifically proven. For best results, consult directly with Biosolution technical team via WhatsApp or see the product details on the POC Formula Bulb Quality product page.

FAQ

1. Can POC Formula Bulb Quality be mixed with chemical pesticides? It is best not to mix directly with chemical pesticides, especially fungicides and bactericides, as they can kill PGPR. If pesticide application is necessary, allow at least 2–3 days interval after biofertilizer application.

2. What is the minimum number of applications for optimal results? At least 4–5 applications during one growing season, starting from 7 DAP with 7–10 day intervals. The more consistent, the better the results.

3. Is this product safe for other plants? Yes, this product is safe for all horticultural and food crops. However, dosage and application schedule need to be adjusted according to plant type.

4. How to store POC Formula Bulb Quality? Store in a cool, dry place away from direct sunlight. Ideal storage temperature is 15–30°C. Do not freeze.

5. Is this product registered with the Ministry of Agriculture? Yes, POC Formula Bulb Quality is registered and organically certified. Complete information can be seen on the product page.