This concentrated liquid silica supplement strengthens your houseplants from the inside out. With 4.5% potassium silicate, it helps build thicker cell walls, boost structure, and protect plants from heat, transplant shock, and other stressors and damage. Ideal for helping houseplants grow upright, bounce back from stress, and grow larger leaves, and maintain their vitality.
✅ Builds upright stems and thicker, sturdier leaves
✅ Helps plants recover from heat, drought, and transplant shock
✅ Reduces browning, tearing, and drooping in delicate foliage
✅ Concentrated for superior value—8 oz bottle makes up to 96 gallons, at least 4x the amount of other silica products
✅ Formulated by plant experts, safe for all houseplants
Mix 1 teaspoon per gallon of water and apply every 2–4 weeks.
Use as a soil drench. Do not mix with fertilizer—apply separately as part of your care routine.
8 oz bottle of liquid Silica Strength
Factory-sealed for leak-free delivery
Flip-top cap for easy measuring
Simple directions and tips on the label
Created by the team behind Monstera Plant Food and Fiddle Leaf Fig Rescue Drops, Silica Strength is developed and made in the USA with quality ingredients and no harsh additives, and trusted by plant parents to protect and support their most prized plants.
1. We operate on trust.
If a product isn't right for your plant, we'll refund you — no return required. No labels, lines, or plant parent stress.
2. Your personal Plant Rescue Squad.
Buying direct means you're not on your own. Reply to your order email with photos and questions, and our plant experts will help troubleshoot what's really going on — light, watering, soil, or something else entirely.
3. A timeline backed by confidence — and real results.
Most customers see healthy changes quickly. We offer 90 days because we believe in our products and want you to feel just as confident using them.
💚 Shop with confidence — We’re a small business that stands behind every product. Thousands of happy plant parents trust us, and we’ll always make things right if anything goes wrong. In addition to high quality products, we aim to provide seamless shipping and satisfaction-guaranteed service.
We ship to the U.S., Canada and the UK, and offer flat-rate pricing to keep things simple. Orders typically ship within 1 business day and arrive within 2-4 business days.
We stand behind our products 100%. If you’re not happy, we’ll make it right.
Return window: You have 30 days from delivery to request a return or refund.
What’s covered:
How to request a return or refund:
Email us at hi@houseplantresourcecenter.com with your order number and a quick description of the issue. We’ll respond within 1 business day.
Once we receive and inspect the returned item, we will process your refund within 7 business days. Refunds will be credited to your original payment method.
The following items are non-returnable:
If you have any questions or need further assistance, feel free to reach out to us at hi@houseplantresourcecenter.com. We're here to help!
★ ★ ★ ★ ★ 5.0
"This works fast! My yellowing leaves turned green again within a week, even after summer heat stress. No odor and great results!"
★ ★ ★ ★ ★ 5.0
"You don’t need much—just one dose made a noticeable difference. My plants perked right up. A true plant saver!"
★ ★ ★ ★ ★ 5.0
"My plants are thriving! This supplement keeps them growing strong and healthy. Great value and I’ll definitely reorder."
★ ★ ★ ★ ★ 5.0
"I have many houseplants and this works beautifully. Deeper green leaves, easy to dilute, and the squeeze bottle makes measuring simple."
★ ★ ★ ★ ★ 5.0
"Highly concentrated and long-lasting—one small bottle makes 96 gallons! My larger plants are standing taller and healthier, especially my Monsteras."
★ ★ ★ ★ ★ 5.0
"Didn’t realize my plants needed this! My Pothos looks stronger and rejuvenated after a week, and now I’m using it on all my plants. Fantastic value."
★ ★ ★ ★ ★ 5.0
"Before using this, I didn’t know silica could strengthen leaves and stems. My lavender and caladiums already look sturdier after a few weeks!"
★ ★ ★ ★ ★ 5.0
"This formula revived my four Fiddle Leaf Figs and two Monsteras. After months of no growth, I’m finally seeing new leaves and stronger stems!"
★ ★ ★ ★ ★ 5.0
"I use this on both indoor and outdoor plants. It’s perfect before overwintering—helps regrowth in spring and keeps stems strong all year."
★ ★ ★ ★ ★ 5.0
"Excellent for my Monstera deliciosa! The 8-oz bottle makes 96 gallons and is easy to store. Love that it’s made in the USA with clear instructions."
★ ★ ★ ★ ★ 5.0
"Great value! Just half a teaspoon per gallon every few weeks strengthens my plants’ stems and helps them handle low light better. Already seeing results."
★ ★ ★ ★ ★ 5.0
"Fantastic concentrate—easy to mix, long-lasting, and noticeable improvement within days. My plants look fresher, sturdier, and full of life!"
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