Jack's Classic All-Purpose 20-20-20 | Sample Pack - 350ct

Balanced All-Purpose Fertilizer, 20-20-20, Sample Pack

A general-purpose feed needs to work across a wide range of plants without favoring one growth stage over another. Jack's Classic All-Purpose is a balanced 20-20-20 formula with nutrients for all indoor and outdoor plants, feeding through both the roots and the leaves.

350-count sample pack, balanced 20-20-20 all-purpose formula.

Key Features & Benefits

• 20-20-20 balanced N-P-K formula — equal nitrogen, phosphorus, and potassium for general-purpose feeding.
• Feeds through both roots and leaves — supports uptake whether applied as a soil drench or foliar spray.
• Suited to indoor and outdoor plants alike — one formula covers a broad range of growing setups.
• Water-resistant label — packaging holds up to regular scooping and mixing without label wear.

Who Should Use Jack's Classic All-Purpose

This fits growers who want one balanced, general-purpose fertilizer for a broad mix of indoor and outdoor plants rather than switching formulas by plant type or growth stage.

About JR Peters / Jack's Classic

Jack's Classic water-soluble fertilizers come from JR Peters, a family-owned company that keeps its testing lab on-site with production, turning around grower plant-tissue and water samples quickly.

Frequently Asked Questions

How and when should this All-Purpose fertilizer be applied?

Mix it according to label directions and apply during the active growing season, since the balanced 20-20-20 ratio is built for general-purpose feeding rather than a single growth stage. It feeds through both the roots and the leaves, so it works as either a soil drench or a foliar application.

What makes a 20-20-20 ratio 'balanced'?

A 20-20-20 ratio supplies equal parts nitrogen, phosphorus, and potassium, which is why it's positioned as an all-purpose formula rather than one targeted at a specific growth stage like blooming or rooting. That even balance is what makes it suited to such a broad range of indoor and outdoor plants.

Is this fertilizer suited for both indoor and outdoor plants?

Yes, the batch's own product description and JR Peters' manufacturer page both describe this as a general-purpose formula for all indoor and outdoor plants. It's a straightforward option for growers who want one all-purpose feed rather than switching formulas by plant type.

What size and packaging is this listing?

This is the 350-count sample pack option, packaged in a plastic tub with a water-resistant label. All All-Purpose sizes share the same 20-20-20 formula, so the choice comes down to how much product a grower needs on hand.