MAMMOTH 10-4-5 Plant + Flower



All the details on usage, application, specifications, and more.

Like you, plants thrive with a well-rounded nutritional diet and Mammoth® 10-4-5 nourishes your plants. Mammoth’s Plant + Flower fertilizer has plant-based nutrients at its core. You’ll see bigger, more beautiful plants.


For best results, follow our simple recommended application rates noted below.

Total Nitrogen (N)……………….10.0%
• 2.10% Ammoniacal Nitrogen
• 1.80% Nitrate Nitrogen
• 5.15% Urea Nitrogen
• 0.75% Other Water Soluble Nitrogen
• 0.20% Water Insoluble Nitrogen
Available Phosphate (P2O5)…4.0%
Soluble Potash (K2O)…………….5.0%

Fermented Oilseed Extract, Phosphoric Acid, Potassium Hydroxide, Ammonium Nitrate, Urea, Magnesium Sulfate, Boric Acid, Copper Sulfate, Iron Sulfate, Manganese Sulfate, Zinc Sulfate, Sodium Molybdate.

For houseplants, mix 1 tsp. (5mL) with one gallon of water and add to plants once monthly.
For outdoor containers and garden plants, mix 1 Tbsp. (15mL) with one gallon of water and add to plants weekly during growing season.

Information regarding the contents and levels of metals in this product is available at:
CAUTION: Keep out of reach of children and pets. Do not take internally.

Product may not be registered in all states.

MAMMOTH 10-4-5 Registration Map


What are the main benefits of using Mammoth Plant + Flower?

It is a well-rounded source of nutrition for plants; it promotes plant growth & overall health. It’s a plant-based formulation; tested to be pathogen-free.

Is Mammoth Plant + Flower organic?


I already use a fertilizer product, how is Mammoth Plant + Flower different?

Mammoth Organic Plant Food has an extremely low salt index compared to other traditional fertilizers. It’s a plant-based formulation with more complex amino acids. It’s been tested to be pathogen-free. Mammoth Organic Plant Food (3-1-1) is a great source of carbon to feed your soil. The same building blocks of Mammoth Organic Plant Food (3-1-1) are there for our Mammoth Tomato + Veggie (8-4-4) & Mammoth Plant + Flower (10-4-5) products.

Is Mammoth Plant + Flower a liquid or dry product?


What is the shelf life? When does it expire?

5 years unopened/sealed. Once opened, use within 12 months.

How should I store Mammoth Plant + Flower?

Store product in its original, labeled container in a cool, dry place, away from direct sunlight. Keep tightly closed when not in use. Avoid storage in a humid environment or above 95°F (35°C) or below 32°F (0°C). Keep out of reach of children and pets, and away from food and drinking water.

How can I measure the product?

Any accurate liquid measuring tool will work.

How often do I apply Mammoth Plant + Flower?

Houseplants: monthly. Garden plants: weekly.

What is the recommended application rate for Mammoth Plant + Flower?

For houseplants, use 1 tsp (5mL)/gallon of water monthly. For outdoor container and garden plants, use 1 tpsp (15 mL)/gallon of water weekly during the growing season. Be sure to shake well before use.

When should I add the fertilizer to water when mixing?

Fill half of tank/reservoir with water, mix in fertilizer, then finish filling.

How long can I leave solution after mixing?

24-36 hours.

Do I need warm water in order to dissolve the product into solution?

No, product will mix into solution in a wide range of water temperatures.

Can I use on my established cuttings/seedlings?


Can I add Mammoth Plant + Flower to a nutrient mix? If so, when, and is the order of mixing important?

Yes, you can add Mammoth Plant + Flower in a nutrient mix. Add any Silica product first, then add any fertilizers & pesticides, then finish the mix with any beneficial additives.

Can I use Mammoth Plant + Flower as a foliar feed?


Can I use Mammoth Plant + Flower alongside other Mammoth products?

Yes, definitely, we highly recommend doing so!

Are there any products I should not use Mammoth Plant + Flower in combination with?

It is compatible with most other garden products; if there is uncertainty – we always recommend a jar compatibility test.

My bottle of Mammoth Plant + Flower froze – is it still OK to use?

It is possible for the liquid to freeze. Do not use if product has been frozen.

Is it normal for my bottle to bloat?

Yes, each Mammoth fertilizer bottle has the potential to bloat. Bloated bottles are not an indicator that product has expired; end-users should off-gas the bottle when bloated.