Arber Organic Bio Protectant 16 oz

Arber Organic Bio Protectant 16 oz

By Arber
$25
Size
8 oz16 oz

A plant extract that tells plants to get ready.
Outdoors, early, and often.

How often?

  • Free ground shippingWhen lights, pots and Arber come to $75
  • Works with our bugsEach Arber page gives the wait before a release
  • Made by ArberPlant care made from biology

01 · What it's for

It doesn't fight disease. The plant does, sooner.

A giant knotweed extract that sets off the plant's own alarm system, so it thickens its cell walls and gets its defenses ready before disease arrives.

Check before you order

  • For outdoor plants; that's how it's labeled.
  • It works through the plant, so use it before trouble and keep the rhythm.
  • Goes on the leaves or into the soil.
  • Our beneficials can go out once the spray has dried.
At a glance
Active
Extract of giant knotweed (Reynoutria sachalinensis), 5%
Size
16 oz concentrate
Mix
2 Tbsp (1 fl oz) per gallon of water
How often
Every 10–14 days to keep plants ready, every 7–10 days when disease is around
Where
Outdoor plants, leaves or soil
Bio Protectant

02 · With our beneficials

Fine alongside
our beneficials.

It doesn't go after insects or mites, so the only wait is for the spray to dry. Release on the same day if you like.

Once the spray has driedthen release any of our beneficials

From our spray timing table, the same one Toby uses. Asking about a different spray? Ask Toby in the chat.

03 · Works with

Goes well with

Pairs withBio FungicideView →Feeds itPlant FoodView →Mix it inSpray BottleView →

04 · Set it up

Through the season

  1. Start before trouble

    Start before trouble

    The plant needs a few days to respond, so begin while it's still healthy.

  2. Mix

    Mix

    2 tablespoons per gallon of water.

  3. Leaves or soil

    Leaves or soil

    Spray the leaves until wet, or water it in around the roots.

  4. Keep going

    Keep going

    Every 10–14 days, tightening to every 7–10 days when the weather turns damp.

05 · Field notes

Plants have an immune system.
This one rings the bell.

A false alarm, on purpose

How it works

A false alarm, on purpose

Plants can sense an attack and switch on their defenses. Knotweed extract triggers that same response without the attack, so the plant thickens cell walls and builds defensive compounds ahead of time.

Give it a head start

Good practice

Give it a head start

Because the plant does the work, it takes a few days to respond. Spray on a schedule, not in a panic.

The maker

Arber

Plant care made
from biology.

Arber builds its range from living things: bacteria that guard leaves, a plant extract that wakes up a plant's own defenses, and nutrients from produce that would otherwise have been thrown away. Its sprays use the same kinds of actives commercial growers rely on, registered with the EPA.

We carry it because its sprays can share a plant with our bugs when the timing is right, and every Arber page here gives you that timing.

Bacteria
that guard leaves
Plant extracts
that switch on defenses
Upcycled produce
turned into plant food
Bio InsecticideBio InsecticideInsecticide for Roses & FlowersInsecticide for Tomatoes & Vegetables

Shop all Arber →

Before you order

Your questions, answered

Something else? Ask Toby in the chat, bottom right.

Can I use it on houseplants?

It's labeled for outdoor use, so we keep it outside. Indoors, Bio Fungicide is the one to reach for.

How is it different from Bio Fungicide?

Bio Fungicide puts helpful bacteria on the leaf to block disease. Bio Protectant works inside the plant, getting its own defenses ready. They work in different ways, so they go well together.

Can I use it with beneficial insects?

Yes. Release them once the spray has dried. In testing it was harmless to cucumeris and Aphidius.

8 oz or 16 oz?

Same liquid. The 8 oz suits a few beds or containers; the 16 oz is for a garden on a regular rhythm.

More about Bio Protectant

Arber Bio Protectant is an extract of giant knotweed. It doesn't attack anything itself. It nudges the plant into raising its own defenses: thicker cell walls and the compounds plants make when they sense trouble.

It's labeled for outdoor plants. Use it as a regular tonic through the season, on the leaves or into the soil. It's fine with our beneficials once it dries.

Ready when you are

Bio Protectant

A plant extract that tells plants to get ready. Outdoors, early, and often.

More help

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