Can I use this in potted plants?

That's all I use it on. I've used it for years and it's been great. I use it when I get plants from wherever ( nursery, Lowes, Home Depot, etc.) and want to put them into pots. I use the Bio-Tone starter to be sure they get good root growth and to make sure the transfer from little nursery containers to a bigger pot are successful.

I used this for the first time last night. It smelled like organic fertilizer. Today, I went to use it and it smells like ammonia. Is this OK?

Organic fertilizers can sometimes continue to compost if kept in a very warm place. The nitrogen heats it up further causing the ammonia smell. If the bag doesn't feel too warm, this is not a big deal, but I recommend you store it in a cool place to maintain the natural N-P-K balance and micro-organism makeup.

Can this be used in a potting mix (vermiculite and coconut choir) for starting seeds? Or will it cause burn?

Yes, definitely use it for potting mix- it promotes root growth like nothing I've ever used before and the strong odor comes from the mycorrhizae fungus- not from anything that would burn the seeds.

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Espoma Organic Bio-Tone Starter Plus 4-3-3 Natural & Organic Starter Plant Food with Both Endo & Ecto Mycorrhizae; 4 lb. Bag; The Ultimate Starter Fertilizer - Pack of 1

Product ID: 1180982

Details

Brand
Espoma
Item Form
Granules
Item Weight
4 pounds
Liquid Volume
4 liters
Specific Uses For Product
Gardening

🌱4-3-3 NPK for balanced growth

🦠Dual endo & ecto mycorrhizae boost roots

🇺🇸Made in USA, trusted since 1929

R$502

Duties & taxes included

In stock

Sold byAmazon BrazilDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌿 Grow smarter, not harder — the organic starter your garden deserves!

SYMBIOTIC ROOT BOOST - Enhanced with both endo & ecto mycorrhizae to supercharge nutrient uptake and root development.
READY TO USE CONVENIENCE - No mixing needed—just blend with soil at planting for instant root zone activation.
CERTIFIED ORGANIC CONFIDENCE - Registered Organic Input Material, ideal for eco-conscious gardeners who demand purity and performance.
LEGACY OF NATURAL EXCELLENCE - From Espoma, the pioneer in organic gardening since 1929, ensuring quality you can trust.
ALL IN ONE ORGANIC POWERHOUSE - Perfectly formulated 4-3-3 NPK with 5% calcium for vibrant, healthy plants from day one.

Espoma Organic Bio-Tone Starter Plus is a premium 4 lb. natural and organic plant food featuring a balanced 4-3-3 fertilizer formula enriched with 5% calcium and dual endo & ecto mycorrhizae. Designed for use at planting or transplanting, it promotes robust root growth and nutrient absorption. Certified for organic gardening and made in the USA by a trusted leader since 1929, this ready-to-use granule fertilizer ensures your plants get the ultimate start for thriving growth.

Specifications

ASIN	B000J3AG2K
Best Sellers Rank	#17,054 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #500 in Garden Fertilizers #1,222 in Plants, Seeds & Bulbs
Brand Name	Espoma
Coverage	Medium
Customer Reviews	4.8 4.8 out of 5 stars (2,557)
Global Trade Identification Number	00050197038041, 00077349922027, 00885351226336
Included Components	Grass Seed, Plant Fertilizer
Item Form	Granules
Item Type Name	OUTDOOR RECREATION PRODUCT
Item Weight	4 pounds
Liquid Volume	4 liters
Manufacturer	Espoma
Mixing Ratio	9 pounds per cubic yard or 1 cup per cubic foot
Model Number	ESPOMA - BTSP4
Number of Items	1
Number of Packs	1
Part Number	ESPOMA - BTSP4
Specific Uses For Product	Gardening
Target Species	plants
UPC	077349922027 617407746358 050197038041 885351226336 050197035101
Warranty Description	Warranty

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