Peters Professional 15-0-15 Peat-Lite Dark Weather Fertilizer | 25lb (80/PL)

25lb Dark Weather Peat-Lite Fertilizer for Bulbs, 15-0-15

Low-light, overcast growing conditions call for a different nutrient balance than a sunny-season feed, especially for bulb crops. Peters Professional 15-0-15 Peat-Lite Dark Weather Fertilizer is a classic high-nitrate formula for bulbs or any crop that needs extra calcium and magnesium.

Sold as a 25lb bag, 80 per pallet, basicity 221 lbs. CCE, no urea.

Key Features & Benefits

• Classic high-nitrate formula — built for bulbs or any crop needing extra calcium and magnesium.
• Lower phosphate — matched to dark-weather growing conditions rather than a sunny-season feed.
• Slightly higher growing media pH — a deliberate part of the Dark Weather formulation.
• Matched to Water Types 1 and 2 — suited to lower-alkalinity bulb and landscape irrigation water.
• Full range of micronutrients, basicity 221 lbs. CCE, no urea — rounds out the 15-0-15 base ratio.

Who Should Use Peters Professional 15-0-15 Dark Weather Peat-Lite Fertilizer

This fits bulb growers and other crops needing extra calcium and magnesium during low-light, overcast growing periods, on Water Types 1 and 2.

About Peters Professional 15-0-15 Dark Weather

Peters Professional 15-0-15 Dark Weather is one of 13 water-soluble formulations manufactured by ICL Growing Solutions for commercial greenhouse and nursery nutrition programs.

Frequently Asked Questions

What crops is Dark Weather formulated for?

It's a classic high-nitrate formula for bulbs or any crop that needs extra calcium and magnesium. Its lower phosphate and slightly higher growing media pH set it apart from a standard peat-lite feed.

Why is this called a 'Dark Weather' formulation?

It's built for lower phosphate and slightly higher growing media pH conditions that fit low-light, overcast periods better than a sunny-season formula would. Bulb crops in particular benefit from that adjusted nutrient balance.

What water types is this fertilizer designed for?

It's ideal for Water Types 1 and 2. It provides a full range of micronutrients alongside its high-nitrate, low-phosphate base.

What does the basicity rating tell me?

This formulation carries a basicity of 221 lbs. CCE with no urea, a moderate-to-higher basicity that supports the slightly higher growing media pH the Dark Weather formula is built around.

What size and packaging is this listing?

It ships as a 25lb bag, supplied 80 per pallet, matching its basicity rating of 221 lbs. CCE. That volume suits commercial bulb and nursery feeding programs on Water Types 1 and 2.

How and when should this fertilizer be used?

Apply it through regular irrigation feeding during low-light, overcast growing periods, particularly for bulb crops that need the lower-phosphate, higher-pH balance it's built around. It's meant to replace a sunny-season formula for the duration of that darker growing window, not layer on top of one.