Bee Garden Codes: What They Mean & How to Use Them

Bee garden codes are shorthand labels used by gardeners, seed sellers, and pollinator advocates to quickly identify plants that attract and support bees. You enter a plant’s code or select it from a list, and the calculator below converts it into a simple bee-friendliness score and bloom period estimate, helping you plan a pollinator-friendly garden.

Formula

The calculator uses a simple mapping: each letter in the code represents a plant category (B = bee magnet, P = pollinator-friendly, N = nectar-rich, S = shade-tolerant), and the number indicates the bloom duration in months. The score is assigned as follows: B = 9, P = 7, N = 6, S = 5, with a base of 0. The bloom period is simply the number you enter. So the formula is:

Score = (letter value) + (number of months × 0.5) — but capped at 10.

Variables: letter value is 9, 7, 6, or 5 depending on the first character; number of months is the digit you enter (1–6).

Worked Example

Using the default code B1:

• Letter B → value 9
• Number 1 → 1 month of bloom
• Score = 9 + (1 × 0.5) = 9.5, capped at 10 → 10
• Bloom period = 1 month

The calculator shows 10 and 1 month, matching the example.

What Are Bee Garden Codes?

Bee garden codes are a loose convention, not a universal standard. They appear on seed packets, plant tags, and online catalogs to give a quick visual cue about a plant’s value to bees. While there is no single official system, the most common pattern is a letter followed by a number, where the letter indicates the type of pollinator attraction and the number indicates bloom duration or hardiness zone.

For example, a code like B2 might mean “bee magnet, blooms for 2 months,” while P3 could mean “pollinator-friendly, 3 months of flowers.” Some catalogs use a simple star rating or a bee icon instead. The key is to check the legend on the specific seed packet or website you are using, because codes vary by seller.

How to Read the Codes

If you encounter a code without a legend, here are the most common interpretations:

• B – Bee magnet: plants like lavender, borage, and catmint that attract many bees.
• P – Pollinator-friendly: includes butterflies and other insects, not just bees.
• N – Nectar-rich: high sugar content in nectar, good for honeybees.
• S – Shade-tolerant: suitable for shady spots, but still bee-attractive.
• The number often indicates bloom months (1–6) or a hardiness zone (e.g., 3–9).

Always verify with the source. If no legend exists, treat the code as a rough guide, not a guarantee.

Why Use Bee Garden Codes?

These codes help gardeners quickly compare plants without reading long descriptions. They are especially useful when planning a pollinator garden because they let you:

• Mix early, mid, and late bloomers to provide food all season.
• Avoid plants that require full sun if you have shade.
• Choose high-nectar options for honeybees specifically.

They also help seed sellers standardize information across many species. However, because they are not regulated, codes can be inconsistent. A “B1” from one nursery might mean something different from another’s.

Common Mistakes and Misconceptions

One common mistake is assuming the number always means bloom duration. In some catalogs, it indicates the plant’s hardiness zone (e.g., 3–9) or even the number of bees it attracts on a scale of 1–5. Always check the legend.

Another misconception is that a higher score means the plant is “better” for bees. In reality, native plants are often more beneficial than non-natives, even if they have a lower code. Codes measure attractiveness, not ecological value.

Also, codes do not account for pesticide use. A plant can be labeled bee-friendly but still be treated with neonicotinoids, which are harmful to bees. Always buy from sources that guarantee no bee-toxic pesticides.

How to Choose the Right Plants

When using codes, follow these steps:

1. Check the legend on the seed packet or website to understand what the letters and numbers mean.
2. Choose a mix of codes: early bloomers (B1, P1) for spring, mid-season (B3, P3) for summer, and late bloomers (B5, P5) for fall.
3. Prioritize native plants whenever possible. Native bees are adapted to local flora.
4. Avoid hybrids with double flowers, as they often produce less nectar and pollen.
5. Include a variety of flower shapes to attract different bee species (e.g., flat daisies for small bees, tubular flowers for bumblebees).

Limitations of the Codes

Codes are a simplification. They do not tell you about:

• Pollen quality (some plants have low-protein pollen).
• Bloom overlap (you need continuous bloom, not just total months).
• Plant size and spacing requirements.
• Soil and sunlight needs beyond the basic shade/sun indication.

Use codes as a starting point, then research each plant’s full profile before planting.

Frequently Asked Questions

Do all seed companies use the same bee codes?

No. There is no universal standard. Each company may have its own system. Always look for a legend or explanation on the packaging or website. If you cannot find one, contact the seller or look up the plant species separately.

Can I create my own bee garden code?

Yes, you can make a personal system to track your garden. For example, use “B” for bee magnet, “H” for hummingbird, “S” for shade, and a number for bloom months. As long as you understand your own codes, they can be a helpful planning tool.

What does a code like “B2” mean exactly?

It depends on the source. Most commonly, it means a bee magnet plant that blooms for about 2 months. However, some catalogs might use the number as a hardiness zone (2 = very cold hardy). Always verify with the legend.

Are native plants always better for bees than non-natives?

Generally, yes. Native plants have co-evolved with local bees and often provide better nutrition. However, some non-natives like lavender and borage are excellent bee plants. The best approach is to plant a mix, with a majority being natives.

How can I attract more bees without using codes?

Focus on plant diversity, avoid pesticides, provide water (a shallow dish with stones), and leave some bare ground for ground-nesting bees. Also, let some herbs and vegetables flower (e.g., basil, chives) as they are highly attractive to bees.

Do bee codes apply to all types of bees?

No. Honeybees, bumblebees, and solitary bees have different preferences. A plant that is great for honeybees might not attract bumblebees. Codes usually refer to general bee attraction, not specific species. To support a wide range, use a diverse planting.

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in t | Plant code (e.g., B1, P2, N3) | - | B1 | 0
out score | Bee-friendliness score | /10 | 8 | 0
out bloom | Bloom period (months) | months | 3 | 0