Best 19-0-0 Type Fertilizers for Lush Lawns and Gardens
Answering your search for nitrogen-rich, phosphorus-free fertilizers, this guide highlights top options that emphasize high nitrogen with minimal or zero phosphorus. These products are best for quick green-up, stressed turf, or leafy plant growth without increasing phosphorus levels. The list includes pre-emergent options, fast-acting nitrogen sources, and calcium nitrate blends to support blossom health and cell structure. Suitable buyers include landscapers seeking rapid turf color, home gardeners focusing on greens and foliage, and hydroponic enthusiasts needing soluble nitrogen sources.
Quick product snapshot
| Product | Best For | Why It Stands Out |
|---|---|---|
| Lesco 19-0-6 Dimension Pre-Emergent Fertilizer | Turf managers wanting pre-emergent weed control with high nitrogen | Combines 19-0-6 NPK with Dimension pre-emergent weed control for proactive lawn protection |
| Dark Matter 21-0-0 Ammonium Sulfate Fertilizer | Rapid green-up for lawns and gardens | Ultra-fine, fast-acting nitrogen boost with versatile use |
| Calcium Nitrate 15.5-0-0 (Cz Garden Supply) | Indoor/outdoor plants needing nitrogen and calcium | Water-soluble formula supports leafy growth and calcium-rich cell walls |
| Supply Solutions Calcium Nitrate 15.5-0-0 + 19% Ca | Vegetables and fruit with BER prevention | Combines nitrate nitrogen with calcium for strong fruit development |
| Emerald Lawn Fertilizer 10-0-20 | Lawns needing deep green color with controlled growth | Slow-release nitrogen and micronutrients for steady color without excessive growth |
The following sections expand on each product, clarifying who should buy, why it’s featured, and any practical caveats to consider when choosing a fertilizer with zero or low phosphorus.
Lesco 19-0-6 Dimension Pre-Emergent Fertilizer
The Lesco 19-0-6 Dimension Pre-Emergent Fertilizer is designed for proactive weed control and lawn nutrition. It combines 19% nitrogen, 0% phosphorus, and 6% potassium with Dimension herbicide to prevent crabgrass and select broadleaf weeds before they germinate. Best for turf managers and homeowners who want a single product that feeds while pre-empting weed growth. Caution: the pre-emergent component may limit broadleaf weed control post-emergence, so timing is essential for best results.
10-0-20 Emerald Lawn Fertilizer
The Emerald Lawn Fertilizer 10-0-20 is characterized by a balanced approach to lawn color and structure. With 10% nitrogen, 0% phosphorus, and 20% potassium, it supports a deep green color while promoting drought tolerance and root strength. Best for warm-season and cool-season grasses needing color without encouraging excessive top growth. Caution: lower nitrogen than some high-visibility green-ups may require more frequent applications for sustained color.
Dark Matter™ 21-0-0 Ammonium Sulfate Fertilizer
Dark Matter 21-0-0 Ammonium Sulfate Fertilizer delivers fast green-up through a high-nitrogen, phosphorus-free formulation. It’s versatile for lawns, gardens, and vegetables, especially when a rapid nitrogen boost is desired. Best for existing lawns needing quick color and growth acceleration. Limitation: the absence of phosphorus may require separate phosphorus sources for flowering crops or fruiting plants that need it.
Calcium Nitrate 15.5-0-0 Fertilizer (Cz Garden Supply)
The Cz Garden Calcium Nitrate 15.5-0-0 Fertilizer provides water-soluble nitrogen along with calcium to support leaf growth and strong plant structure. It’s ideal for indoor plants, hydroponics, or outdoor crops where calcium needs are high. Best for growers seeking quick availability of nitrogen and simultaneous calcium delivery. Caution: high nitrate content requires careful application in enclosed spaces or sensitive setups to prevent over-fertilization.
Supply Solutions Calcium Nitrate 15.5-0-0 + 19% Ca (10 Pounds)
This Supply Solutions blend combines 15.5% nitrogen with 19% calcium, designed to accelerate plant growth while preventing blossom end rot in fruiting crops. Best for vegetable gardens and hydroponics where calcium support is essential for fruit quality. Limitation: no potassium included, so you may need a separate source if potassium is a goal for your crop mix.
Buying Guide
Key considerations to pick the right zero- or low-phosphorus fertilizer:
- Nitrogen form and release rate: Choose fast-acting nitrate forms for quick green-up or slow-release nitrogen to reduce burn and runoff.
- Phosphorus presence: If you monitor soil P levels or have phosphorus-sensitive landscaping, prefer 0-0 or 0-N formulations like 19-0-6 or 21-0-0 blends.
- Calcium requirements: For tomato, pepper, or fruiting crops, calcium nitrate blends help prevent blossom end rot and strengthen cell walls.
- Target area: Lawns often benefit from higher nitrogen with controlled release, while gardens may need calcium and micronutrients for robust growth.
- Application method: Water-soluble fertilizers work well with fertigation or hydroponics, while granules are common for lawn application with spreaders.
- Weed control considerations: If pre-emergent weed control is desired, products like Dimension-enhanced fertilizers offer both weed prevention and feeding benefits.
Frequently Asked Questions
- What does 19-0-0 fertilizer mean? It indicates 19% nitrogen, 0% phosphorus, and 0% potassium. This type emphasizes nitrogen for green growth while avoiding phosphorus and potassium increases.
- When should I use a phosphorus-free fertilizer? Use when soil tests show adequate phosphorus or when you want to limit phosphorus runoff to protect water quality.
- Can I use these fertilizers on all grasses? Most are suitable for common warm- and cool-season grasses, but check product labels for specific turf compatibility and application rates.
- Is calcium nitrate safe for hydroponics? Yes, calcium nitrate is widely used in hydroponic systems for rapid nitrogen delivery and calcium support, but follow exact dosing instructions to avoid imbalances.
- Do zero-phosphorus fertilizers affect flowering plants? Some flowering crops require phosphorus for bloom development; for those plants, consider a phosphorus-containing fertilizer or a targeted P source as needed.
- Are there safety concerns with high-nitrogen fertilizers? Over-application can cause leaf burn or environmental runoff; always follow label directions and water properly after application.