Tomatoes and peppers are two of the most popular and productive fruiting crops in both home gardens and commercial farms across the United States. They’re heavy feeders, fast growers, and extremely rewarding when grown properly—but they’re also vulnerable to a very specific and frustrating problem that ruins countless harvests: blossom-end rot. While many people mistakenly believe blossom-end rot is caused by pests or disease, it’s almost always the result of calcium deficiency at a crucial point in fruit development.
The best way to solve this problem is to use a fertilizer that provides immediately available calcium in a highly soluble form, backed by a nitrogen source that stimulates root development and nutrient uptake. That’s exactly what Supply Solutions Calcium Nitrate 15.5-0-0 delivers.
Calcium nitrate is not just a supplement—it’s a foundational nutrient for high-performing tomato and pepper crops. The combination of nitrate nitrogen and water-soluble calcium makes it the most efficient way to prevent blossom-end rot, promote healthy foliage, and increase fruit firmness and shelf life. Whether you’re a backyard gardener or managing an acre of high tunnels, incorporating calcium nitrate into your feeding schedule can dramatically improve the quality and consistency of your harvest.
Calcium is essential for building plant cell walls. It helps glue cells together, reinforces structural tissue, and improves overall plant stability. Without adequate calcium, cells in developing fruits break down, leading to soft spots, rot, or collapse. Unfortunately, calcium doesn’t move easily through plant tissue—it must be constantly supplied to new growth. Once calcium is delivered to a cell, it doesn’t move to other parts of the plant. This makes new leaves and forming fruits especially vulnerable if calcium becomes unavailable even temporarily.
For tomatoes and peppers, calcium deficiency shows up most dramatically as blossom-end rot: a brown or black patch at the bottom of the fruit where cells have collapsed. But it can also appear in other ways—curled leaves, stunted growth, or weak stems.
Calcium is also important for:
Calcium nitrate provides calcium in a nitrate form—meaning it’s fully water-soluble and immediately available for plant uptake. Traditional sources of calcium like lime or gypsum are slow-release and dependent on soil pH and microbial activity to break down. In contrast, calcium nitrate goes to work immediately, making it ideal for correcting calcium deficiencies fast.
It also contains nitrate nitrogen (NO3-N), which is the most plant-available form of nitrogen. Unlike ammonium nitrogen or urea, nitrate doesn’t acidify the soil or compete with calcium for uptake. In fact, nitrate nitrogen helps stimulate calcium movement into plant tissues by increasing transpiration and root pressure. That makes calcium nitrate not just a source of calcium, but a delivery system that ensures the calcium actually reaches the parts of the plant that need it most.
Here’s why calcium nitrate stands out as the best fertilizer choice for tomatoes and peppers:
Timing and consistency are key. Tomatoes and peppers require steady calcium availability during flowering and fruiting. Interruptions—even for a few days—can result in irreversible damage to developing fruit.
Here’s how to apply Supply Solutions Calcium Nitrate 15.5-0-0 for best results:
Soil Drench (Field or Garden Use):
Foliar Spray (Rapid Uptake):
Fertigation (Greenhouse/Drip Irrigation):
Side Dressing (Field Rows):
Calcium nitrate can be used alongside many other fertilizers, including balanced NPK blends and organic feeds. However, avoid mixing it directly with products containing sulfates (e.g., magnesium sulfate, potassium sulfate) or phosphate (e.g., monoammonium phosphate), as these combinations may cause precipitation and clog irrigation lines or sprayers.
A typical integrated feeding schedule for tomatoes and peppers might include:
There are many forms of calcium nitrate available on the market, but Supply Solutions LLC provides a premium, trusted formulation used by both home gardeners and professionals. Our 15.5-0-0 formula contains 19% water-soluble calcium and is packaged to maintain freshness and solubility, ensuring consistent performance in the field or garden.
Our customers choose Supply Solutions because we offer:
We don’t just sell fertilizer—we help you grow better plants and get more from every square foot of soil.
If you’re growing tomatoes and peppers, don’t wait for blossom-end rot or fruit damage to appear. Calcium nitrate is a proactive, proven tool to prevent common problems and maximize your harvest. It’s easy to apply, works fast, and fits into virtually any feeding schedule.
Make calcium nitrate your secret weapon for growing big, beautiful, and healthy tomatoes and peppers.
To order or get expert advice on how to apply it to your specific garden, greenhouse, or farm:
Contact Supply Solutions LLC
We’re here to support your growing success—one strong plant at a time.
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