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Plagron Alga Bloom 0.5l
Plagron Alga Bloom 0.5L is an organic bloom fertiliser based on seaweed extracts in a practical half-litre bottle. With an NPK ratio of 3-2-5, this organic nutrient supports flower development and fruit formation. The 500 ml bottle is the ideal size for hobby gardeners with a limited number of plants or growers looking to trial Alga Bloom. The composition featuring organically bound nitrogen and high potassium promotes compact, fragrant flowers. Dose at a maximum of 4 ml per litre of water. Discover this versatile bloom feed and order now from Plant&Flower.
Plagron Alga Bloom 0.5L – practical organic bloom feed
Plagron Alga Bloom 0.5L is the optimal choice for hobby gardeners and small-scale growers seeking a reliable organic bloom fertiliser. This half-litre bottle contains the same premium seaweed-extract formula as the larger sizes, with an NPK ratio of 3.3-2.3-5.4 tailored for flowering plants. Browse our complete selection of plant nutrients for all phases of your grow.
Key features
The 0.5L bottle provides ample feed for small-scale grow projects and serves as an excellent introduction to the Alga Bloom formula.
- NPK 3.3-2.3-5.4 — balanced bloom nutrient with potassium emphasis
- 500 ml bottle — yields 125 litres of nutrient solution
- Contains iron (0.023%), manganese (0.014%), boron (0.012%) and additional trace elements
- Organic seaweed-based formula, pH 5.5
Application & usage
Apply a maximum of 4 ml Alga Bloom per litre of water at every irrigation throughout the flowering period. The half-litre bottle is compact enough for convenient storage and features a practical dosing cap. Store frost-free and away from direct sunlight. Explore the full Plagron product line at Plant&Flower for complementary products.
Benefits for the grower
The 0.5L bottle represents the mid-range option in the Alga Bloom lineup, providing a sound balance between price and volume. With 125 litres of nutrient solution, you can comfortably sustain a handful of plants through an entire bloom cycle. The organic composition ensures a natural end product with full flavour and aroma. This product integrates seamlessly into the Plagron Natural line for organic cultivation.
Combinations & alternatives
Pair Alga Bloom with Plagron Sugar Royal for enhanced flavour and increased resin production. Begin the vegetative phase with Plagron Alga Grow and transition to Alga Bloom at the onset of flowering. For a complete starter kit, the Plagron Easy Pack Natural bundles the essentials in one convenient package.
Conclusion
Plagron Alga Bloom 0.5L is the convenient mid-size option for hobby growers who want organic bloom nutrition without committing to a large container. The proven formula delivers consistent results with every grow. Order from Plant&Flower and receive your delivery quickly across Belgium.
Technical specifications
| Primary elements (% w/w) | |
|---|---|
| Total nitrogen (Ntot) | 3.3% |
| Organic bound nitrogen (Norg) | 2.6% |
| Ammonium nitrogen (NH4-N) | 0.7% |
| Phosphorus pentoxide (P2O5) | 2.3% (water soluble) |
| Potassium oxide (K2O) | 5.4% (water soluble) |
| Trace elements (% w/w) | |
|---|---|
| Boron (B) | 0.012% |
| Copper (Cu) | 0.002% |
| Iron (Fe) | 0.023% |
| Manganese (Mn) | 0.014% |
| Molybdenum (Mo) | 0.0007% |
| Zinc (Zn) | 0.010% |
| Physical and chemical properties | |
|---|---|
| Acidity (pH) | 5.5 |
| Conductivity (EC) | 46 mS/cm |
| Density | 1.24 g/ml |
| Form | Liquid |
| Colour | Dark brown |
| Odour | Molasses specific |
| Foaming | None |
| Storage & usage | |
|---|---|
| Storage temperature | 0°C – 35°C (frost-free, away from direct sunlight) |
| Dosage | Max. 4 ml per 1 litre of water (1:250) |
| Application | At every watering during the flowering phase |
| Shelf life | 4 years after production (unopened) |
How many plants can Plagron Alga Bloom 0.5L support?
With 500 ml of Alga Bloom you can prepare 125 litres of nutrient solution at the maximum dose of 4 ml per litre. For a small grow setup with 3 to 5 plants in 10-litre pots, this typically covers a complete flowering period of 6 to 8 weeks, depending on watering frequency.
Is the 0.5L bottle the same formulation as larger sizes?
Yes, all Plagron Alga Bloom bottle sizes contain exactly the same formula. Whether you choose the 0.1L, 0.25L, 0.5L, 1L or 5L option, the composition with NPK 3.3-2.3-5.4 and the full trace element profile is identical. Only the volume and consequently the per-litre price differs.
When should I switch from Alga Grow to Alga Bloom?
Transition to Alga Bloom as soon as your plants enter the flowering stage. For photoperiod plants, this is when you switch the light schedule to 12/12 hours. For autoflowers, the changeover typically occurs around week 3 to 4 when the first flowers become visible. Make the transition gradually for optimal results.
Can Alga Bloom be used for outdoor plants?
Absolutely, Alga Bloom is suitable for both indoor and outdoor cultivation. The organic composition works particularly well in open soil because soil microorganisms actively assist in nutrient processing. Dose at the same rate as for indoor growing: a maximum of 4 ml per litre of water at each irrigation during bloom.
