Bloom Seaweed yellow bottle, southern bull kelp plant and soil conditioner by Bloom Yellow Bottles

Seaweed by Bloom — Southern Bull Kelp Plant and Soil Conditioner

BLOOM-SEAWEED-300

$9.95
/
Tax included. Shipping calculated at checkout.

Southern bull kelp plant and soil conditioner that keeps growth steady through heat, transplant and hard weeks. 1ml per litre, veg to bloom.

Size
  • Handpicked by growers
  • Ships today
  • Real advice, real people
  • 5,000+ high yielding customers
  • 30-day returns*
  • Free shipping over $499*
  • Low stock - 3 items left
  • Backordered, shipping soon

Pairs well with

Heat, transplant, a hard week: every stress event costs growth. Seaweed by Bloom is a plant and soil conditioner made from a single kelp, southern bull kelp from the cold Southern Ocean, carrying natural growth compounds, alginates and potassium. It runs at 1ml per litre in every feed from seedling to bloom, and around transplants and hot spells especially. A litre makes 1,000 litres. It's a conditioner, not a nutrient, so it sits on top of your base feed, and it's priced to run every watering.

Steadies growth under stressNatural growth compounds that keep plants moving through heat, transplant and hard weeks.
One kelp, Australian sourcedSouthern bull kelp from the cold Southern Ocean off southern Australia.
Conditions the soil tooAlginates help soil hold structure and moisture.
1 litre makes 1,000 litresAt 1ml per litre, and the cheapest bottle in the Bloom range.
Every feed, veg to bloomOne rate through the cycle, with no stage changes to track.
Soil, coco or hydroBloom lists the same rate across all three.

Specifications
Brand: Bloom (Agricultural Organics)
Type: Plant and soil conditioner
NPK: 0.17 - 0.027 - 3.2789
Key inputs: Southern bull kelp (Durvillaea potatorum)
Rate: 1ml per litre
When to use: Every feed, seedling to bloom; especially around heat, transplant and stress
Yield: 1L makes 1,000L of feed at 1ml/L
Concentrate pH: 8–10 (alkaline)
Suits: Soil, coco and hydro
Sizes: 300ml, 1L, 2.5L
Made in: South Australia
Biodegradable: Yes, 100% (manufacturer)

Grower's Tip
  • Keep Seaweed in the feed around transplants and heatwaves, when stress costs the most growth.
  • It's a conditioner, not a base feed. Keep your base nutrients at their normal rate.
  • Outdoor beds and living soil get the most from the alginates, which help soil hold moisture.
  • Want kelp plus fish and humates in one bottle? Seafuel is the bigger version.
  • Add it with your other nutrients and adjust pH last. The concentrate is alkaline.
  • Shake well before use. Colour and consistency vary a little between batches, which is normal.

How To Use It
1Shake the bottle well.
2Add 1ml per litre to your nutrient solution or watering can alongside your base nutrients.
3Mix thoroughly, then check and adjust pH last.
4Feed at every watering, seedling to bloom.
5Keep it in through transplants and hot spells, and stop with your other additives for the final flush.

Pairs Well With

Frequently Asked Questions
What is Bloom Seaweed made from?

A single kelp: southern bull kelp (Durvillaea potatorum) from the cold Southern Ocean off southern Australia.

How much do I use?

1ml per litre, every feed, from seedling to bloom.

Is it a fertiliser?

No, not really. It's a plant and soil conditioner with a little potassium. It sits on top of your base feed.

When is it most useful?

Around stress: transplants, heatwaves and any week where growth stalls. Bloom runs it every feed anyway.

What's the difference between Seaweed and Seafuel?

Seaweed is straight bull kelp. Seafuel is the same kelp with tuna hydrolysate and humic acid added.

Do I need to cut back my base nutrients?

No. Bloom designs its additives to run alongside your base feed at its normal rate, so you add Seaweed on top rather than in place of anything.

How long does a bottle last?

A litre makes 1,000 litres of feed at 1ml per litre. The 300ml makes 300 litres.

Is it certified organic?

No. Bloom makes the range mostly from natural inputs, but the products are not certified organic, so we don't sell them as organic.

Select Size

Steady the Plant, Protect the Yield

Free shipping over $499*.

Shop All Bloom

This site is protected by hCaptcha and the hCaptcha Privacy Policy and Terms of Service apply.

Growers First, Retailers Second

Welcome to The Grow Guys

We built The Grow Guys from the soil up — well, coco and perlite. Before we sold gear, we bought it, ran it, and learned the hard way what's worth the money and what ends up in the shed. That's the filter everything on our shelves passes through. No sales scripts, no rebadged junk, no telling you what you want to hear. Just gear we'd run ourselves and advice from people who actually grow. Chasing higher yields, tighter flowers, or your first harvest? You're in the right place.

Meet The Grow Guys

FAQs

Order by 2pm and it ships the same business day from Invermay, Tasmania.

Calculated at checkout by weight and destination. Free shipping over $499*.

Plain packaging, no branding. No one knows what's in your box.

30-day change-of-mind returns on unopened, unused products. A 10% restocking fee applies and return shipping is at your cost.

Call, email, or walk into the Invermay shop. You'll get a grower on the other end, not a script.

Unit 10/110 Gleadow Street, Invermay 7248. Mon–Fri 8:30am–5:30pm, Sat 9am–3pm.

You may also like

Recently viewed