Potassium Fertilizer

Potassium Fertilizer by TPS Plant Foods

Liquid potassium fertilizer for stronger stems, better blooms and fruit, and improved stress tolerance. Provides targeted potassium feeding when plants need additional support for roots, flowers, or crops.

Why buy direct

More than a bottle on a shelf.

  • Talk to real plant people. Questions about your plants? Our team makes the formula and answers directly — you're not on your own.
  • Made in-house, in the USA. Every bottle mixed and filled by us, not a third party.
  • Backed by our Healthy Plants Guarantee. Feed it for 30 days — if you don't see healthier growth, we'll make it right.
  • Bundle savings you'll only find here. Pair it with any other TPS formula and ship free over $15.