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BlackBerry Fertilizer

Liquid blackberry fertilizer for bigger, sweeter berries. Feeds thornless and trailing varieties from cane growth through harvest.

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$2.99 flat shipping · FREE over $15

30-day money-back guarantee 1 million+ growers served Made in the USA

Works for blackberry varieties

  • thornless blackberries
  • triple crown
  • arapaho
  • navaho
  • prime-ark
  • marionberry
  • boysenberry
  • ouachita

Results you can see

Feeds foliage for deeper color and a brighter, more lively look.

Feeds foliage for deeper color and a brighter, more lively look.

Encourages fresh leaf and stem growth for a fuller, thriving plant.

Encourages fresh leaf and stem growth for a fuller, thriving plant.

Supports healthy, resilient roots that absorb nutrients more effectively.

Supports healthy, resilient roots that absorb nutrients more effectively.

What's inside your bottle — macronutrients, core minerals, micronutrients, and natural kelp

How to use

  1. Mix

    Shake Well and Add 1 tsp per quart (32 oz) of water.

  2. Feed

    Water your plants as normal. Spring & summer: every 1–2 weeks. Fall & winter: every 4 weeks.

  3. Grow

    Watch how your plants thrive!

Frequently asked questions

When should I feed blackberries?

In early spring as canes leaf out, and again after the harvest to feed the new canes that will fruit next year. Skip late fall feeding so canes harden before winter.

How long will one bottle last?

At 1 tsp per quart, the 8 oz bottle makes about 48 watering cans of feed. For a typical shelf of 10–15 plants fed every 1–2 weeks in season, that's several months of feeding — and the 32 oz bottle four times that.

How often should I feed my blackberry?

Every 1–2 weeks in spring and summer while it is actively growing, then every 4 weeks in fall and winter. Mix it into your regular watering at the labeled dilution so feeding never becomes a separate chore.

Why are my berries small?

Water stress and crowded canes are the usual culprits. Keep plants evenly watered while fruit sizes up, thin canes so light reaches them, and feed consistently through the season.

Can I use it on potted and in-ground plants?

Yes. Use the same dilution for both — a watering can for containers and small beds, a hose-end sprayer set to the labeled rate for larger in-ground plants.

Will this burn my plants?

Not when used as directed. The dilution is designed for regular feeding, and a liquid spreads evenly through the soil instead of sitting in a hot spot the way granules can. If you ever overdo it, flush with plain water.

When will I see results?

Greener leaves and stronger new growth show within a few weeks; the flowering and fruiting benefits build over the season and are most visible at the next harvest.

Let's Start Growing!

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BlackBerry Fertilizer $11.99