Quantum·Micronutrients

Proventus Ultra Boron (B)

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Proventus Ultra Boron (B) — a highly concentrated boron micronutrient fertilizer with boron 21% as highly soluble borates for foliar feeding of field, fruit, berry and vegetable crops.

Main advantages

Boron 21% as highly soluble borates — readily available
Oilseed rape in spring 1.5–2.0 — rosette and stem extension
Wheat, barley — 0.2–0.3 tillering, 0.15–0.2 stem elongation
With boron deficiency — repeat after 7–10 days

Overview

About this product

Proventus Ultra Boron (B) — a highly concentrated product for preventing boron deficiency based on readily available forms of boron, highly soluble borates. The boron content is 21%.

Per the maker, boron improves the work of the phloem-vascular system, flowering and pollination and increases the number of flowers. The maker gives rates in l/ha: wheat, barley 0.15–0.3, maize 0.2–0.3, oilseed rape in spring 1.5–2.0, pome fruit 0.5–1.0, stone fruit, currant, raspberry, strawberry 0.3–1.0, grapes, potato, cucumbers 0.7–1.0, tomatoes 0.5–1.0, with boron deficiency repeated after 7–10 days.

Pack of 10 kg.

Application

Rate, timing and crops

Rate

Crop	Application rate, l/ha	Growth and development stage
Winter and spring wheat, winter and spring barley	0.2–0.3	Tillering (BBCH 21–29)
Winter and spring wheat, winter and spring barley	0.15–0.2	Stem elongation – flag leaf (BBCH 30–49)
Maize	0.2–0.3	3–5 leaves (BBCH 13–15); 6–8 leaves (BBCH 16–18)
Winter and spring oilseed rape, mustard	0.7–1.0	4–6 leaves (BBCH 14–16)
Winter and spring oilseed rape, mustard	1.5–2.0	Spring rosette – stem extension (BBCH 21–39)
Winter and spring oilseed rape, mustard	0.7–1.0	Budding (before flowering) (BBCH 50–61)
Sunflower	0.5–0.7	2–3 pairs of leaves (BBCH 14–16)
Sunflower	0.7–1.0	5–6 pairs of leaves (10–12 leaves) (BBCH 30–33)
Soybean, pea	0.3–0.5	3–5 trifoliate leaves (BBCH 14–16)
Soybean, pea	0.7–1.0	Budding – start of flowering (BBCH 51–61)
Sugar and fodder beet	0.2–0.3	4–6 leaves (BBCH 14–16)
Sugar and fodder beet	0.3–0.5	Leaf closure in the rows (BBCH 19–34)
Sugar and fodder beet	0.7–1.0	Leaf closure between the rows (BBCH 35–39)
Pome fruit (apple, pear, quince)	0.7–1.0	Before flowering (BBCH 51–59)
Pome fruit (apple, pear, quince)	0.5	After flowering (BBCH 71–72)
Pome fruit (apple, pear, quince)	0.7–1.0	After harvest (BBCH 89–97)
Stone fruit (apricot, peach, sweet cherry, cherry)	0.7–1.0	White bud (BBCH 51–55); before flowering (BBCH 55–59)
Stone fruit (apricot, peach, sweet cherry, cherry)	0.3–0.5	After harvest (BBCH 89–97)
Grapes	0.7–1.0	Before flowering (BBCH 51–59)
Currant, raspberry, gooseberry	0.3–0.5	Before flowering (BBCH 51–59)
Currant, raspberry, gooseberry	0.7–1.0	Flowering (BBCH 61–69), at 7–10 day intervals
Currant, raspberry, gooseberry	0.3–0.5	After harvest (BBCH 89–97), at 7–10 day intervals
Strawberry (for everbearing varieties the scheme is repeated)	0.7–1.0	Start – end of flowering (BBCH 61–69)
Strawberry (for everbearing varieties the scheme is repeated)	0.3–0.5	After harvest (BBCH 89–97)
Potato	0.7–1.0	Tuber formation (BBCH 40–41); flowering (BBCH 61–69)
Tomatoes, pepper, aubergines	0.5	Start of flowering (BBCH 61–63)
Tomatoes, pepper, aubergines	0.7–1.0	Full (mass) flowering (BBCH 63–69)
Cucumbers	0.7–1.0	Leaf growth and development (BBCH 12–29), at 7–10 day intervals
Nut	0.7–1.0	Bud swell (BBCH 01–09); flowering (BBCH 61–69); fruit development and ripening (BBCH 71–89)

Winter and spring wheat, winter and spring barley

Application rate, l/ha: 0.2–0.3
Growth and development stage: Tillering (BBCH 21–29)

Winter and spring wheat, winter and spring barley

Application rate, l/ha: 0.15–0.2
Growth and development stage: Stem elongation – flag leaf (BBCH 30–49)

Maize

Application rate, l/ha: 0.2–0.3
Growth and development stage: 3–5 leaves (BBCH 13–15); 6–8 leaves (BBCH 16–18)

Winter and spring oilseed rape, mustard

Application rate, l/ha: 0.7–1.0
Growth and development stage: 4–6 leaves (BBCH 14–16)

Winter and spring oilseed rape, mustard

Application rate, l/ha: 1.5–2.0
Growth and development stage: Spring rosette – stem extension (BBCH 21–39)

With boron deficiency (by visual or laboratory diagnosis), for all crops, especially fruit, berry and vegetable crops, treatments are repeated at 7–10 day intervals

Method: Foliar feeding with standard sprayers: spray solution 200–400 l/ha for field and vegetable crops, 500–1000 l/ha for grapes and fruit crops
Conditions: Prepare the spray solution immediately before application: fill the tank 2/3 with water and, while stirring, add the components one at a time, waiting until the previous one is evenly mixed
Spray in the morning or evening; optimal air temperature 10–25 °C, wind up to 5 m/s
Tank mix: Joint application with plant protection products and other fertilizers is possible
Before mixing, check compatibility: a test spray solution must not form a precipitate, slight turbidity is acceptable
Crops: WheatBarleyMaizeOilseed rapeMustardSunflowerSoybeanPeaSugar beetFodder beetApplePearQuinceApricotPeachSweet cherryCherryGrapesCurrantRaspberryGooseberryStrawberryPotatoTomatoesPepperAuberginesCucumbersNut

Figures from the manufacturer, Quantum. Source page

Specifications

Nutrient composition

Brand	Quantum
Type	Micronutrient
Composition Boron (B), as highly soluble borates21%
Application	Foliar
Target Crops	Wheat, Barley, Corn, Rapeseed, Mustard, Sunflower, Soybean, Peas, Sugar Beet, Fodder beet, Apple, Pear, Quince, Apricot, Peach, Sweet cherry, Cherry, Grapes, Currant, Raspberry, Gooseberry, Strawberry, Potato, Tomato, Pepper, Eggplant, Cucumber, Nut crops, Winter wheat, Spring wheat, Winter barley, Spring barley, Winter rapeseed, Spring rapeseed, Pome fruit, Stone fruit
Manufacturer	НВК «Квадрат»
Packaging	10 kg
Origin country	Ukraine

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Questions & answers

What farmers ask most

Rates depend on crop, prior history, soil analysis and nutrient status. An agronomist sets the dose from this product's label — not an NPK-complex template of 150–300 kg/ha.

Product specifications are compiled from publicly available manufacturer sources and are provided for guidance only — confirm all details with the vendor before purchase. Brand names, logos and trademarks are the property of their respective owners; a listing on ADAM does not imply affiliation, sponsorship or endorsement.

Proventus Ultra Boron (B)

About this product

Rate, timing and crops

Nutrient composition

ADAM finds the vendor

What farmers ask most

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