Acidifier
Acidifier
The perfect fertilizer for all azaleas, roses and acid loving plants.
An especially designed fertilizer for the care and maintenance of Azaleas. It was developed in conjunction with Mr. Bart Brechter, Garden Curator of the fabulous Bayou Bend Gardens in Houston, Texas. MicroLife Acidifier 6-2-4 is outstanding nutrition for all plants that want a low pH environment. Contains extra Sulfur (14%) and Humates to bring out the true health and true beauty of your Azaleas, Roses and Acid Loving Plants.
- The perfect fertilizer for all acid loving plants that want a pH of 5.0–7.0
- Works exceedingly well as turfgrass fertilization.
- Excellent for offsetting high pH & sodic irrigation water & soils.
- Developed in conjunction with Bart Brechter, Garden Curator of Bayou Bend Gardens.
- Provides extra Sulfur, extra Humates over 100+ minerals, vitamins, natural plant hormones, natural plant stimulators, essential sugars/amino acids/carbon and protein plus billions of beneficial microorganisms per bag including Endo & Ecto Mycorrhizal Fungi.
- 100% slow release, 1% Iron, 12% Sulfur, will not burn and completely safe for all life forms.
Rates:
- Building beds and gardens: 40 lb per 1,000 sq ft worked into the soil
- Top dressing of ornamentals and gardens: 20–40 lb per 1,000 sq ft. Repeat every 3–4 months.
- Turfgrass: 20 lb per 1,000 sq ft. Repeat every 3–4 months
Couldn't load pickup availability
We offer custom mixes at an additional $50 charge. Simply reach out!
How Ordering Works
Add your products to cart
Browse mulch, soil, stone, sand, and more. Pick the quantities you need. One simple checkout gets everything ready for your project.
Choose pick-up or local delivery
Choose pickup to have your order ready at our yard, or local delivery to bring it straight to your driveway or job site. Either way, we’ll handle the heavy lifting.
Add your information
At checkout, provide your name, phone number, and address for delivery, plus your preferred date and morning or afternoon window. This helps us schedule your order the way that works for you.
We'll see you soon!
Our team will give you a quick call to confirm your order and timing. Once everything’s set, you’re good to go—we’ll have it ready or deliver it when expected.
All About Supersacks
What are Supersacks?
What are Supersacks?
Super sacks are industrial-grade flexible bags designed to store and transport bulk materials. Rather than loose soil or material, consider it like a shopping back for your product!
How much do they cost?
How much do they cost?
Each sack is $30 in addition to the material cost.
What is the cost?
What is the cost?
All our supersacks have a flat $150 delivery fee up to 20 miles from Sienna Mulch.
What's the benefit of a Supersack over loose material?
What's the benefit of a Supersack over loose material?
This option is for the homeowner and landscaper that loves organization and cleanliness. Also, it allows you to order multiple items in one delivery.

