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Hydrofarm Physan PSPTA20 Algaecide, Fungicide, Bactericide, Virucide, 16-Ounce fertilizers, 16 oz, Natural

Visit the Hydrofarm Store

4.7 1,092 ratings

Amazon's Choice in Garden Fertilizers by Hydrofarm

$15.99

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Purchase options and add-ons

Item Form	Liquid
Item Weight	0.27 Kilograms
Brand	Hydrofarm
Specification Met	epa approved
Target Species	Fungus

About this item

Physan 20 fungicide
General control of plant pathogens on inanimate hard surfaces
For non-porous surfaces, orchids, fountains, ornamentals
Available in 16-ounce

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Hydrofarm Physan PSPTA20 Algaecide, Fungicide, Bactericide, Virucide, 16-Ounce fertilizers, 16 oz, Natural

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Product Description

Physan 20 is a broad range disinfectant, fungicide, virucide & algaecide which effectively controls a wide variety of pathogens on hard surfaces & plants. Its applications include greenhouses; hard surfaces; lawn & turf grass; seedlings & cut flowers; decorative fountains, pools & birdbaths; & plants. Physan 20 is an EPA approved concentrate formulated with unique Germicidal agents to provide overall protection for your plants & greenhouses. Physan 20 controls disease-spreading organisms which can be carried from plant to plant by using contaminated pots, flats, seed beds, soil, tools & human hands.

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Product information

Item Weight

9.6 ounces

Manufacturer

Hydrofarm

ASIN

B000I2UTAQ

Item model number

PSPTA20

Customer Reviews

4.7 1,092 ratings

4.7 out of 5 stars

Best Sellers Rank

#23,610 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden)
#732 in Garden Fertilizers

Is Discontinued By Manufacturer

Warranty & Support

Product Warranty: For warranty information about this product, please click here

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	This Item Hydrofarm Physan PSPTA20 Algaecide, Fungicide, Bactericide, Virucide, 16-Ounce fertilizers, 16 oz, Natural	Recommendations Cleary Chemical 3336 DG Lite Granular Fungicide - 30 Pounds	dummy Garden Safe 32 oz. Fungicide Ready to Use	dummy Spectracide Immunox Multi-Purpose Fungicide Spray Concentrate For Gardens 16 Ounces, Protects Up To 2 Weeks	dummy Scotts DiseaseEx Lawn Fungicide, Controls and Prevents Disease Up to 4 Weeks, Treats Up to 5,000 sq. ft., 10 lbs.	dummy Bonide Captain Jack's Copper Fungicide, 32 oz Ready-to-Use Spray for Organic Gardening, Controls Common Diseases
	Try again! Details Added to Cart	Try again! Details Added to Cart	Try again! Details Added to Cart	Try again! Details Added to Cart	Try again! Details Added to Cart	Try again! Details Added to Cart
Price	$19.99	$96.95	$9.66	-25% $12.98 List: $17.30	-12% $22.99 List: $25.99	$10.98
Delivery	Get it as soon as Friday, May 17	—	Get it as soon as Friday, May 17	Get it as soon as Friday, May 17	Get it as soon as Friday, May 17	Get it as soon as Friday, May 17
Customer Ratings	4.71,092	4.75	4.41,165	4.52,062	4.412,755	4.45,349
Easy to use	—	—	4.1	4.7	4.6	4.5
Value for money	—	—	3.7	4.5	3.9	3.9
Sold By	Gold Dist	Lawn & Pest Control Supply	Amazon.com	Amazon.com	Amazon.com	Amazon.com
liquid volume	—	—	10 fluid ounces	16 fluid ounces	0 liters	32 fluid ounces
form	Liquid	Granules	Spray	Spray	Patch	Spray
weight	0.27 kilograms	30 pounds	2 pounds	1.2 pounds	10 pounds	1 pounds

Customer reviews

4.7 out of 5

1,092 global ratings

How customer reviews and ratings work

Customers say

Customers like the performance, quality and safety of the pesticide. For example, they say it works fantastically, is very happy with the results and is safe for birds. That said, opinions are mixed on the safety.

AI-generated from the text of customer reviews

54 customers mention51 positive3 negative

Customers are satisfied with the performance of the product. They mention that it works well, is effective, and has numerous uses. Some say that it is helpful for pretty much any type of plants and that it has no complications for leaf blight.

"Very effective and highly recommend even for orchids." Read more

"Great product" Read more

"...It is so versatile in what it can do. It really works!! Gentle on any plant I've used it on. I call it a miracle product...." Read more

"...Seems to work with no complications for leaf blight on macrophylla hydrangeas...." Read more

37 customers mention35 positive2 negative

Customers are satisfied with the quality of the product. They mention that it works well for watering orchids, keeping them healthy, and happy. It also seems to eliminate algae pretty well, and disinfects potting supplies. Overall, customers are happy with the product's performance and recommend it to others.

"Very effective and highly recommend even for orchids." Read more

"...cleared (and stayed clear for several months after) and the plants continued to thrive as if nothing had phased them." Read more

"...Can also drench the soil." Read more

"...orchids once a month with a good fertilizer and it maintains a wonderful plant that blooms often." Read more

33 customers mention33 positive0 negative

Customers are satisfied with the algae-killing properties of the product. They mention that it works within hours of use, killing any algae and fungus in their fountain. They also say that it's perfect for preventing algae and gunk in their Fountain. Customers also say it eliminates most of the funguses problem on orchids. They say it'll keep the bugs and algae out of their plasma table water.

"...It’s been 3 months n there isn’t any algae growth on any of the pots I treated. Do you have mold growing on your terracotta pots?..." Read more

"...I no longer have the ugly algae problem in any of my water reservoirs...." Read more

"...It's the only product that has ever saved a plant from root rot. Amazing! I highly recommend this!!!" Read more

"Excellent fungicide, hard to find anywhere else" Read more

4 customers mention4 positive0 negative

Customers are satisfied with the rot of the product. They mention that it helps to prevent limp rotting leaves, mushy crowns, and stem, root, and crown rot. It also keeps algae and root rot at bay.

"...They’ve each put out 2-3 leaves since treating them n not a single rust spot...." Read more

"...It should assist with stem, root, and crown rot, mold mildew, mealy bugs, aphids, and fungus. It seems to do a good job so fare" Read more

"...Once a month flush with Physan keeps algae and root rot at bay." Read more

"...Been using it for about 3 years now, no more limp rotting leaves, no more mushy crowns. It takes care of most of the algie in my water pans...." Read more

4 customers mention4 positive0 negative

Customers appreciate the value of the seeds and plants. They say it's a nice size for a great price.

"Nice size for a great price. Came well packaged, i.e. no leaks. No problems here!" Read more

"Great product and value. It’s keeping my orchids healthy." Read more

"Fast delivery. No leaking. Good price. An effective produce with numerous uses. Five stars." Read more

"...I have been using this product forover 7 years. The price is right, and shipping is very fast. Can't beat the complete package." Read more

15 customers mention7 positive8 negative

Customers are mixed about the safety of the product. Some mention it's very effective and safe for pollenators and birds. It's not as toxic as other disinfectants and does not damage copper and brass components. However, others say it'll be extremely dangerous to store around children and that it may damage plant structures slightly.

"...One downside is that they do seem to damage plant structures slightly and the damage may vary between plant species...." Read more

"...Third, it's not as toxic as other disinfectants, that is, toxic to humans and plants...." Read more

"...It is actually a pesticide and has to be use with caution. It is severely corrosive. Instructions should be read before actually using this product." Read more

"...as I live near the river but the trade-off is that it is safe for pollenators according to the data sheet." Read more

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MargotL

Excellent product!

Reviewed in the United States on April 25, 2024

Verified Purchase

Very effective and highly recommend even for orchids.

Helpful

Imogene

NOT JUST FOR ORCHIDS!

Reviewed in the United States on October 27, 2023

Verified Purchase

Just preface.. if you have had a bad experience w/ this product, I truly believe that you either didn’t follow the directions or you used it in a way that it’s not supposed to be used bc I’ve been using this stuff for years now n even the one time that I messed up the dilution rate for a plant that had root rot n I accidentally doubled it, nothing bad happened. I have used this stuff for EVERYTHING n I have never had a bad experience yet. N I have used this on every plant I own at some point. From a Monstera Albo, Philo Melanochrysum, burro tail cactus, palm trees, string of turtles, banana trees, colocasias, amaranth flowers, etc.

This is hands down one of the best products to have if you’re a plant enthusiast. It does it all. (Except kill pests! Just fyi) I bought it originally bc I found some rust fungus on a couple of White Knight Philos I bought as rehab plants. This fixed the issue right away. They’ve each put out 2-3 leaves since treating them n not a single rust spot. So I was obviously impressed n went to town w/ seeing what else this could do. Algae in your semi hydro pots? Make a bucket w/ the appropriate dilution rate n dunk your pots in the mixture & air dry.. it slows down the algae growth process! Before I had to clean my pots atleast once every 2 months bc of algae. It’s been 3 months n there isn’t any algae growth on any of the pots I treated. Do you have mold growing on your terracotta pots? Spray the outside of the pots or soak the pots before use & it will slow it down or kill already molding pots. Are your self watering wicks turning green after just a few days? Treat them w/ the same method as the pots. I do dilute that mixture a little bit more than the directions say to. I’m not sure if it’s necessary. I just wanted to be safe n test it out first. So far so good. No algae build up on my wicks n it’s been about 3 weeks. Before this my wicks would be green within a week! Did your plant get root rot? Chop off all of the dead roots, fill a spray bottle w/ water & add the appropriate amount to the bottle. Shake. Spray the roots down, let them air dry. Then dip the root ball in some rooting hormone &/or some mycorrhizae powder, throw it in some damp sphagnum & give it some time to heal. It will start throwing out new growth in no time. Sometimes if you don’t treat root rot after cutting off the dead parts, the plant could still have issues even after removing it from the pot & putting it in sphagnum. So this will help kill any bacteria/mold n help so your plant can heal & regrow its roots. Do you have some plant saucers that are green & sludge? No worries. Spray the saucer w/ the diluted mix, let it sit for a few, scrub w/ a brush or sponge & once it’s clean, spray the dried saucer or dunk the saucers in a bucket of the diluted mix & let it air dry. Do you have something going on w/ a couple plants that you can’t quite figure out? Maybe it’s some yellowing that isn’t due to pests, lighting, humidity, over/underwatering & you’re scratching your head confused? Spray the plants down w/ the diluted mixture 1-2x a week for 3-4 weeks. Obviously this won’t work for EVERY ailment that affects plants. But since it covers so many bases, the odds are that this could definitely fix the issue. Again, unless it’s pests or an environmental issue. You won’t know what the issue was caused by. But atleast you can stop it from spreading. My brother had an issue w/ his strawberry shake philos where the leaves were browning n turning to mush.. no root rot. Not environmental since it was only a few of them that were grouped together but in the same room, w/ the same lights/humidity/air circulation/soil/watering schedule etc. the others in the same room were thriving. He was stumped. I thought it could be some kind of virus or pest but we looked at all of the plants w/ microscopes & no pests. Plus he uses predatory bugs so it just didn’t make sense. I told him to try this stuff out.. he did just that. He chopped off all of the infected leaves & sprayed the plants down, within a couple weeks the plants were throwing new leaves & no more issues w/ the older leaves dying. We don’t know what the issue was.. but the problem was fixed! I’m not paid by this company btw. I just love this stuff n I wish I had found it sooner.

27 people found this helpful

Helpful

Candi graf

Orchid vitamin

Reviewed in the United States on April 1, 2024

Verified Purchase

Great product

One person found this helpful

Helpful

Goodstuff

Effective for clearing green water in African violet planters.

Reviewed in the United States on April 26, 2023

Verified Purchase

I was worried. Not only is the chemical aspect scary when mixing/storing (lots of warnings on the bottle) around my family and pets, but I was concerned this might harm my little African violets. But the green water despite all efforts to keep it clean was too much for me in the end. So I mixed up a gallon with water as directed and refilled my self watering planters with that mix. The water cleared (and stayed clear for several months after) and the plants continued to thrive as if nothing had phased them.

6 people found this helpful

Helpful

MikePhilbrook

Terrific product

Reviewed in the United States on April 20, 2024

Verified Purchase

I have over 30 African Violet plants that are kept in wicking pots with clear water reservoirs. I have always had a severe problem with algae growing in the reservoirs; it was unavoidable but unsightly. I had tried numerous remedies recommended by fellow violet growers, all to no avail. Once I started using Physan 20, I noticed a major change in the pots. I no longer have the ugly algae problem in any of my water reservoirs. I thought algae was going to be the bane of my existence but Physan 20 changed all that! Love this product!

Helpful

denise mcelroy

It works

Reviewed in the United States on April 25, 2024

Verified Purchase

My orchid had black spot, and this product stopped the progression on this leaf and to the rest of the plant. Can also drench the soil.

Helpful

Sandra A.

Great for orchids!

Reviewed in the United States on March 7, 2024

Verified Purchase

I live in Florida where fungus and bugs abound. I spray this chemical on my orchids once a month with a good fertilizer and it maintains a wonderful plant that blooms often.

2 people found this helpful

Helpful

D Cook

Awesome product!

Reviewed in the United States on August 4, 2023

Verified Purchase

This is the best product I've ever used! It is so versatile in what it can do. It really works!! Gentle on any plant I've used it on. I call it a miracle product. It's the only product that has ever saved a plant from root rot. Amazing! I highly recommend this!!!

5 people found this helpful

Helpful

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