Just applied it for the first time a few days ago. Appears to be perking up my greens
My potted fig plants love this, it’s a wonderful product
This is truly amazing fertilizer, plants absolutely love it, it’s made a huge difference in my garden!
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Made in USA
3-1-4 Guaranteed
Indoor Formula
Measured Pump
30-Day Guarantee
Supports fuller, greener growth
Feeds the moment you water
One formula for foliage and flowering
The pump does the measuring
Kid and pet safe when used as directed
Growing monsteras or other aroids? Meet Monsteras 3-1-2, built just for them.
Bundle & Save
FREE digital Houseplant Handbook
Free shipping unlocked
Save 10% + free shipping
Pick 1, 2 or 3 months.
Ships out in 1 business day
“With over 100 plants in the house, some of which I have had over 20 years … this is a well balanced fertilizer for most houseplants. The pump bottle makes it very easy to dispense with no mess.”
“I've been using this Indoor Core stuff on her... clearly it works. I got new leaves.”
Olivia, anthurium owner

Three digital guides, delivered by email the moment you order. A $29 value, free with every YARDi order. Nothing to ship, nothing to wait for.
The Houseplant Handbook ($19 value), your complete indoor plant playbook
The Indoor Feeding Guide ($6 value), so every watering counts
25 Thriving Secrets ($4 value), the habits behind fuller, greener houseplants
A houseplant lives within the contained ecosystem of its pot. The roots can't reach beyond it for more nutrients, and every watering can wash nutrients out through the drainage holes. When you pay attention to every new leaf, root, and growth point, precise feeding matters.
Bloom formulas: loaded with phosphorus for the fruit and flowers your pothos is never going to set
Fertilizer spikes and granular feed: release from one concentrated spot or on their own schedule, giving you less control over when nutrients reach the root zone
Water alone: doesn't replace the essential nutrients your plant uses as it grows or loses through regular watering
YARDi Indoor Core 3-1-4: mixes directly into your water for a measured, consistent application throughout the pot, making it easier to feed with intention as your plant's needs change
That's the difference between a plant that simply gets by and one that grows full, vibrant, and impossible to ignore.
A spike puts everything in one spot and lets it out on its own schedule. A pump puts the right amount, added straight into your regular watering routine.
Already dissolved, so it's available the moment it reaches the roots
Spread through the whole pot instead of concentrated in one hot spot
The same dose every time, whoever does the watering
Same idea, completely different delivery. Spikes miss the roots and the timing. A pump doesn't.
Your whole routine, in three steps.
STEP 1
Add
Two to four pumps into a 1 quart watering can. The pump measures the dose, no guesswork.
STEP 2
Feed
Water as usual. It's already dissolved, so the roots can use it the moment you pour.
STEP 3
Repeat
Every 2 to 3 weeks during active growth. Ease off in winter when growth slows.
A nursery plant arrives full because it was grown under bright light in freshly fed soil. Put it in the corner of a living room, water it with tap water for six months, and it starts to stretch, drop its bottom leaves, and push out each new leaf a little smaller than the last.
Nothing Left in the Pot
Most potting mix contains an initial dose of nutrients. Once that's used up, a closed pot has no way to make more.
Fed the Wrong Thing
A bloom or all-purpose garden formula is built around fruit and flowers, not the leaves you actually bought the plant for.
Depleted soil and the wrong formula, and the plant gets a little smaller every season instead of bigger.
Indoor Core puts plant-ready nutrition into your regular watering routine, in a ratio built around foliage.
Supports vibrant, continuous foliage growth
Feeds the moment you water, with nothing to break down first
Formulated for indoor conditions
Potassium at 4% adds support for flowering varieties
One formula for a mixed collection of flowering and foliage houseplants
Targeted indoor nutrition across a mixed collection, with added support for the flowering ones.
Every number in the N-P-K has a job (nitrogen, phosphorus, potassium). Here's what the 3-1-4 is doing for a plant in a pot:
Nitrogen (N)
The number that leads. Provides what the plant uses to push new leaves and hold a deep green.
Phosphorus (P)
Kept low on purpose. Enough for roots, propagation and repot recovery, not a fruiting crop's dose.
Potassium (K)
The highest number. Supports water regulation and sturdy, upright growth in dry indoor air.
Indoor Core puts that balance into one pump bottle, formulated for the plants you keep for their leaves.
Ships out within 1 business day
No cheap fillers and no wasted bulk. Indoor Core is built around what a plant in a pot actually runs short of, in a form it can take up right now.
With Indoor Core, every watering is plant-ready nutrition instead of plain tap water.
Here's how Indoor Core compares to the usual ways people try to feed a houseplant:
vs.
Already dissolved for fast root uptake
Feeds the moment you water
No waiting on granules or spikes to break down
Even coverage through the whole pot
vs.
3-1-4 keeps phosphorus low and potassium high
Supports foliage, with added support for flowering
Nitrogen leads, the way a foliage plant wants it
Potassium at 4% for water regulation in dry rooms
vs.
One formula for flowering and foliage plants
No guessing which bottle suits which plant
Consistent feeding across the whole collection
Less to store and less to remember
vs.
The pump meters the dose for you
No measuring spoons and no mixing jug
The same strength whoever does the watering
Harder to overdo by accident
vs.
Every watering carries a little nutrition out the drain holes
Potting mix starts with a charge, and a closed pot can't make more
Plain tap water adds nothing back
Indoor Core replenishes what the pot lost, every time you water
vs.
Watering can, mister, or straight into the pot
Works across flowering and foliage houseplants
16 fl oz with a metered pump
A simple pump and pour routine
Feeds When You Water
Made in the USA
Guaranteed Analysis 3-1-4
For Indoor Use
Kid & Pet Safe as Directed
Measured Pump Dosing
Within Days
Plants take up the liquid fast. Leaves often look more vibrant within days.
1 to 2 Weeks
Steady nutrition supports the new growth points that were sitting idle.
3 to 4 Weeks
New leaves come in, and the ones already there hold a deeper green.
6 to 8 Weeks
Fuller plants with less of the leggy, bare-stemmed look.
3 Months In
A visible difference against a plant living on plain tap water.
Through the Year
Feeding as part of your normal watering keeps growth steady through the year.
Year After Year
The same simple pump routine keeps the collection full season after season.
Ships out within 1 business day
Feed Every Plant You Own From One Bottle
Start feeding Indoor Core risk-free and watch the collection fill back in.
ACT NOW & YOU'LL GET:
More bottles, bigger savings on every bundle
FREE digital Houseplant Handbook + 2 guides with every order ($29 value)
30-day Grow-or-it's-FREE money-back guarantee
FREE shipping on any 2+ bottles
One formula for flowering and foliage houseplants
Two to four pumps into a quart, no measuring spoons
Formulated and designed for indoor use, made in the USA
Ships out within 1 business day
Ships out within 1 business day
Kills pests on contact, repels them with essential oils, and treats mold and mildew. Ready to use, 32 fl oz.
$24.99
A 3-1-2 built for monstera, philodendron and pothos. Nitrogen first, for leaves.
$21.99