News and fertilizing know-how
What does “61% K2O” on a bag of Kali Phú Mỹ mean? How much potassium is in a 50 kg bag and how to adjust the dosage for rice and fruit trees
Reading Phú Mỹ Potash bags: K2Ohh 61% means a 50 kg bag contains approximately 30.5 kg of K2O; available in powder and flake forms; convert PVFCCo dosage to kg/công.
Three bags for three fertilization rounds: Đầu Trâu 997 – 998 – 999 fertilization schedule for early-sown and main-sown Winter-Spring rice
Winter-Spring Rice 2026–2027: Đầu Trâu 997, 998, 999 series as per Bình Điền's recommendation, for topdressing 1 (7–10 DAS), topdressing 2 (18–22 DAS), and panicle initiation, adjust dosage to kg/cong.
For pomelo trees developing fruit for Tet: apply YaraMila Complex 12-11-18 once a month, following Yara's recommended protocol.
Grapefruit from fruit development to harvest stage: Yara recommends applying 0.5 kg YaraMila Complex and 0.1 kg YaraLiva Nitrabor per tree monthly.
For oranges from fruit set to harvest: supplement calcium and boron monthly with 50 g YaraLiva Nitrabor per tree.
Orange trees during fruit set – harvest stage: Yara recommends applying 50 g YaraLiva Nitrabor and 0.2 kg YaraMila Complex per tree monthly.
Later fruit development stages require more potassium: Đầu Trâu Nuôi Trái 14-7-21 for durian, grapefruit, orange, mandarin, dragon fruit
Đầu Trâu Fruit Nurturing 14-7-21 by Bình Điền: for grapefruit, orange, mandarin, durian, avocado 0.5–1.5 kg/tree, 2–3 applications; for dragon fruit 0.3–0.5 kg/post/application.
Corn rotation on rice fields at the end of October: apply basal fertilizer and top-dress seedlings with Đầu Trâu NPK 20-20-15.
Corn (maize) on paddy land: Bình Điền recommends applying Đầu Trâu NPK 20-20-15 as a basal fertilizer at 150–200 kg/ha/application and as a top dressing for seedlings at 150–200 kg/ha/application.
At the end of the flood season, early dry season, for new planting and replanting fruit trees: apply a balanced basal fertilizer with NPK Phú Mỹ 16-16-16+TE.
For new planting and replanting of fruit trees at the end of the rainy season: Use Phú Mỹ NPK 16-16-16+TE as recommended by PVFCCo, apply 50–500 kg/ha as a basal fertilizer; for newly planted trees, choose the lower rate.
Leafy greens and vegetables planted at the end of October for Tết sales: apply a small amount as a base fertilizer, then top-dress multiple times with Phú Mỹ NPK 20-7-7+TE.
Short-term leafy vegetables for Tet sales: Phu My NPK 20-7-7+TE according to PVFCCo, for vegetables, apply 5–20 kg/cong as base fertilizer, and 5–30 kg/cong as top dressing for the entire crop, divided into multiple applications.
Tet vegetables just rooted: read the 20-10-10+TE formula and convert Phú Mỹ NPK dosage for vegetables to kg/công
Vegetables and crops planted for Tết sales: Phú Mỹ NPK 20-10-10+TE, according to PVFCCo, apply 5–40 kg/công as basal fertilizer, and 5–50 kg/công/crop as top dressing, divided into multiple applications.
Early sown fields with newly emerged seedlings: divide Đạm Phú Mỹ by days after sowing, convert dosage from kg/ha to kg/công.
For early-sown Winter-Spring rice (October 10–30) reaching the top-dressing stage: apply Phu My Urea (N 46.3%) according to PVFCCo's guidelines, converting kg/ha to kg/công, avoiding excessive nitrogen application.
Fruits have set and are growing for Tet sales: divide 2–4 applications to nourish the fruits with NPK Cà Mau 20-10-15.
Gardens growing fruit for Tết sale: PVCFC recommends applying NPK Cà Mau 20-10-15 at 300–600 g/plant/application, once after fruit set and 2–4 times during fruit development.
Salinity intrusion threatens the 2026–2027 dry season: prepare potassium and fresh water for fruit orchards
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Early direct-sown rice in coastal areas, 10-20 days old: How to apply the first topdressing for strong tillering?
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What does the 17-7-17+TE formula on the Phú Mỹ NPK bag mean? Read the label and convert kg/ha dosage to kg/công for fields and gardens in the Mekong Delta
Read the NPK Phú Mỹ 17-7-17+TE label: what do nitrogen, phosphorus, potassium, and TE mean, how many nutrients are in one bag, convert kg/ha dosage to kg/công.
Early-sown Winter-Spring rice, just emerged: fertilization schedule at 7–10 and 18–22 days after sowing with NPK Cà Mau 20-15-7+1Mg+TE Mùa Vàng 1
Early Winter-Spring rice fertilization schedule based on sowing date: 7–10 and 18–22 days after sowing with NPK Cà Mau 20-15-7+1Mg+TE Mùa Vàng 1, 8–12 kg/1000m².
Vĩnh Long coastal area, early sowing for Winter-Spring crop from October 10-30: prepare for basal fertilization with NPK Phú Mỹ 16-16-8+13S+TE
Coastal Vĩnh Long early sowing from Oct 10-30: prepare for basal fertilization with NPK Phú Mỹ 16-16-8+13S+TE, calculate sulfur content to avoid over-fertilization.
Durian, pomelo, orange at flowering stage: Đầu Trâu AT 2 dosage for each tree type and how to apply around the canopy
Apply 1–2 months before flowering: dosage of Đầu Trâu AT 2 (7-17-12) for durian, pomelo, orange, mandarin, dragon fruit, mango, and application method according to the canopy.
Once fruits have set, continue nurturing them: apply Đầu Trâu AT 3 in 2–3 doses for durian, pomelo, mango, and dragon fruit.
After fruit set, high potassium is needed: how to divide 2–3 applications of Đầu Trâu AT 3 (14-10-17) for durian, pomelo, mango, and dragon fruit, according to Bình Điền.
Late-season Autumn-Winter rice is still in the panicle initiation stage: count days after sowing, then apply NPK Cà Mau 16-8-16 Mùa Vàng 2 at the right time.
Late-sown Autumn-Winter rice: count days after sowing to apply panicle initiation fertilizer at 38–42 days, 15–18 kg/công of NPK Cà Mau 16-8-16 Mùa Vàng 2, choose the amount based on leaf color.
Garden just drained: apply fertilizer only after seeing new roots – fruit tree recovery schedule with NPK Phú Mỹ 20-20-15+TE
Fruit orchards after flooding: till the soil, apply organic fertilizer, and only apply Phú Mỹ NPK 20-20-15+TE at a low dose, divided into multiple applications, once new feeder roots are observed.
Tet market vegetables and newly sown rice: consider sulfur first, then Phú Mỹ NPK 17-17-8+13S+TE.
For Tet market vegetables and newly sown rice: read the sulfur content on the NPK Phú Mỹ 17-17-8+13S+TE bag to apply the right type, at the right time, and in the right amount.
DAP Hồng Hà 18-46 black granules early season: basal application for rice, stimulate root growth in gardens after floods without excess phosphorus
How much DAP basal fertilizer for rice to root well, and for gardens after floods? Use Hồng Hà 18-46 black granule DAP where high phosphorus is needed, avoiding excess phosphorus.
High nitrogen is a double-edged sword: stimulate rice tillering and tree shoot growth after floods with NPK Con Cò Vàng 20-10-10 at the right time.
Can NPK Con Cò Vàng 20-10-10 be used to promote tillering in rice and new shoots in orchards after floods? Yes, but at the right time and in the right amount.
For newly sown Winter-Spring rice, should phosphorus or nitrogen be applied first? How to correctly apply NPK Cà Mau 18-16-8 for basal fertilization and the first top-dressing.
For newly sown Winter-Spring rice, should basal fertilizer or early topdressing be applied, and how much is appropriate? How to divide the amount of NPK Cà Mau 18-16-8 for the first two applications of the season.
“If rice isn't green enough, add more nitrogen”? Prepare for the tillering stage in the Winter-Spring crop with the correct amount of NPK Phú Mỹ 20-7-7+TE
Prepare for the tillering fertilization of the Winter-Spring rice crop according to the principles of right type, right time, and right amount, using Phú Mỹ NPK 20-7-7+TE as an example.
Acid sulfate soil after the wet season: when and how much lime to apply before sowing the Winter-Spring crop?
Acidic/Alum-affected fields before Winter-Spring sowing: Is lime application necessary, when to apply, how many bags per công, using Phú Mỹ Lime as an example.
Floodwaters have just receded, observe the rice leaves to fertilize: read the leaf color, calculate the amount of Phú Mỹ NPK 15-5-20+TE for the panicle initiation stage in the Autumn-Winter crop.
After the flood, check the roots first, then read the color of the rice leaves, and then convert to the amount of Phú Mỹ NPK 15-5-20+TE per công for the panicle initiation stage in the Autumn-Winter crop.
Fruits are developing, rice is about to panicle initiation: when is NPK Cà Mau 20-10-15+1Mg+TE suitable, and when should the formula be changed?
A formula with high nitrogen, moderate phosphorus, and sufficient potassium, along with Mg and micronutrients, is suitable for which stage of rice and fruit orchards in the Mekong Delta; and when should the formula be changed or acid soil/salinity be treated first.
Gardens along the Hau River: When do fruit trees need NPK 16-16-16, and when should the ratio be changed?
On the alluvial soil north and south of the Hau River, gardens often lack balanced fertilization more than they lack nitrogen. NPK Phú Mỹ 16-16-16+TE is suitable for the recovery-balancing window; late-fruiting often requires higher potassium.
Saline-acidic soil before the Winter-Spring crop: prepare the soil first, then apply nitrogen fertilizer.
On saline-acidic soil in the Mekong Delta, proper fertilization starts with soil preparation and improvement. Đầu Trâu Bio-Canxi is an example of a micronutrient/secondary nutrient product for treating saline-acidic conditions and rice straw.
Don't over-apply nitrogen for quick greening: what does the tillering window need?
After sowing, rice needs nitrogen-phosphorus-potassium at the right time rather than applying single nitrogen. Đầu Trâu Bio Lúa 1 is an example of NPK 19-12-6+TE+microorganisms for seedling growth–tillering.
Balanced fertilization in Vĩnh Long soil: don't just increase nitrogen when rice-orchards simultaneously need NPK
Vĩnh Long alluvial soil often lacks balanced fertilization more than it lacks nitrogen. NPK Cà Mau 20-20-15 is a single-granule product for when N–P–K are needed simultaneously — without altering the soil base or adding high potassium at the end of the season.
Before Winter-Spring: if the soil isn't ready to absorb nutrients, don't rush to apply nitrogen — fertilize correctly right from the land preparation stage.
Before the Winter-Spring crop in the Mekong Delta: prepare the soil, improve the foundation, then fertilize. OM CAMAU-GREEN is an example of pelleted organic fertilizer when applied at the right time and in the right role.