Jack's Professional 21-5-20 All Purpose LX Fertilizer | 25lb (80/PL)

All Purpose LX Fertilizer for Alkaline Water Conditions, 21-5-20

Alkaline irrigation water works against many fertilizers before the plant ever sees a nutrient benefit. Jack's Professional 21-5-20 All Purpose LX is a water-soluble fertilizer ideal for moderate to high alkalinity waters, formulated with over 60% nitrate nitrogen and a peat-lite level of micronutrients.

25lb (80/PL), acidic 407 lbs. CCE, no urea.

Key Features & Benefits

• Ideal for moderate to high alkalinity water — formulated specifically to perform where alkaline irrigation water limits other fertilizers.
• Over 60% nitrate nitrogen, no urea — supports the compact growth and green foliage nitrate nitrogen tends to produce.
• A lower-phosphorus alternative to 20-10-20 — manufacturer-confirmed positioning for growers wanting less phosphorus in their program.
• Tank-mixable with other LX blends — manufacturer-confirmed, doesn't reduce micronutrient concentration when combined.

Who Should Use This All Purpose LX Formula

This fits commercial growers of bedding and potted plants working with moderate to high alkalinity irrigation water who want an all-purpose formula built around that water chemistry.

About the LX Fertilizer Series

Jack's Professional LX-series formulas like this All Purpose blend are engineered around specific water-chemistry challenges, in this case alkalinity, and are designed to tank mix with other LX blends without reducing micronutrient concentration.

Frequently Asked Questions

Why choose this formula for alkaline water?

Jack's Professional 21-5-20 All Purpose LX is a water-soluble fertilizer ideal for moderate to high alkalinity waters, formulated with over 60% nitrate nitrogen to work with that water chemistry rather than against it. It's also an acidic formula rated at 407 lbs. CCE, which helps offset alkalinity over repeated applications.

What plants can this formula be used on?

It's labeled for use on all bedding and potted plants, and can also be used for plugs at low rates. That range makes it a flexible all-purpose option across different production stages.

How does this compare to Jack's Professional 20-10-20?

JR Peters positions this 21-5-20 formula as a lower-phosphorus alternative to their 20-10-20 blend, useful for growers who want to dial back phosphorus while keeping a similarly high nitrate nitrogen profile. Both are part of the broader Jack's Professional lineup for commercial production.

Can this be tank mixed with other LX formulas?

Yes, JR Peters confirms this formula can be tank mixed with other LX blends without reducing micronutrient concentration, giving growers flexibility to combine LX products in a single feeding pass. That compatibility is a stated feature of the LX series specifically.