Fermentation Nitrogen for Healthy Yeast Activity
Diammonium Phosphate, commonly known as DAP, is a concentrated source of inorganic nitrogen and phosphate for yeast during fermentation.
DAP yeast nutrient is particularly useful in low-nitrogen fermentations such as wine, cider, mead, sugar washes, hard seltzer and some fruit-based ferments. Supplying sufficient nitrogen during the early stages of fermentation helps support yeast growth, fermentation activity and reliable attenuation.
Available in 100g and 1kg packs.
Why You'll Love It
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Provides readily available nitrogen for yeast
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Supports yeast growth during early fermentation
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Useful in low-nitrogen musts, juices and sugar washes
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Can help reduce the risk of sluggish fermentation caused by nitrogen deficiency
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Suitable for wine, cider, mead and selected brewing or distilling applications
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Concentrated formula requiring only a measured amount
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Available in convenient 100g and economical 1kg sizes
Suitable Fermentation Applications
DAP can be used in:
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Wine
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Apple and fruit cider
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Mead
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Fruit wine
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Sugar washes
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Hard seltzer
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Selected distilling washes
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High-adjunct or low-malt fermentations
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Other fermentations with insufficient available nitrogen
Most all-malt beer wort already contains usable nitrogen from malt. DAP should therefore only be added to beer wort when the recipe, wort composition or fermentation conditions indicate that additional nitrogen is required.
Recommended Dosage
The correct amount depends on the fermentation type, yeast strain and existing yeast-assimilable nitrogen level.
For wine, cider and mead, a common starting range is:
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0.1–0.2g per litre
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2–4g per 20 litres
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Approximately 2.3–4.6g per 23 litres
Use the lower end unless the recipe, yeast manufacturer or nutrient analysis indicates a greater requirement.
DAP is concentrated and should be weighed with an accurate digital scale. Avoid relying on spoon measurements.
How to Use DAP Yeast Nutrient
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Calculate the required dose for the fermentation volume and recipe.
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Weigh the DAP accurately using a digital scale.
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Dissolve it in a small amount of clean water, juice, must or wash.
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Add it before fermentation or during the early active-growth stage.
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Mix thoroughly while minimising unnecessary oxygen exposure after fermentation has begun.
For larger additions, staged dosing during the early part of fermentation may help moderate yeast activity and heat production.
Do not add DAP late in fermentation unless specifically directed by a validated recipe or fermentation protocol.
Is DAP a Complete Yeast Nutrient?
No. DAP supplies inorganic nitrogen and phosphate, but it does not provide the vitamins, minerals, amino acids, sterols and yeast-derived nutrients found in a complete fermentation nutrient.
For demanding or nutrient-poor fermentations, DAP may be used as part of a broader nutrient program alongside a suitable complete yeast nutrient.
Does Every Fermentation Need DAP?
No. DAP should only be used when additional yeast-assimilable nitrogen is required.
Wine, cider, mead and sugar-based fermentations are more likely to benefit because their natural nitrogen levels can be low. Standard all-malt beer wort often contains sufficient nutrients without a separate DAP addition.
Excessive nutrient additions may cause overly rapid fermentation, increased heat production or residual nutrients in the finished product.
How Should DAP Be Stored?
Keep the package sealed and store it in a cool, dry location away from moisture, direct sunlight and strong odours.
Always use clean, dry equipment when measuring the product and reseal the package immediately after use.
Why Buy from Border Brewing Supplies?
Border Brewing Supplies stocks fermentation nutrients and ingredients for home brewers, winemakers, cider makers and distillers throughout Tweed Heads, the Gold Coast, Northern Rivers, Brisbane and the wider Queensland–New South Wales border region.
Order Diammonium Phosphate DAP online for Australia-wide delivery or choose Click & Collect from our Tweed Heads South home brew shop.
Recommended Products
For better fermentation control, consider adding:
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Complete yeast nutrient
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Digital mini scale
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Hydrometer
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pH meter or test strips
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Brewing or wine yeast
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No-rinse sanitiser
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Digital fermentation thermometer
