The electric cobalt hue of a true blue salvia spike against charcoal-black calyces is a visual event that few other perennials can match. It’s a cold color that pulses with life, drawing hummingbirds in from across the yard with a promise of nectar.
I’m Mohammad Maruf — the founder and writer behind Gardening Beyond. I’ve spent years digging through germination data, comparing supplier genetics, and analyzing thousands of aggregated buyer reports to understand what separates a thriving salvia patch from a disappointing, leggy letdown.
Whether you are ordering a live starter plant or packing out a seed packet, the goal remains the same: a vigorous, true-to-type specimen that earns its spot in the border. This guide breaks down the top choices for black and blue salvia seeds and live starts, so you can pick the right path for your garden’s timeline and your patience level.
How To Choose The Best Black And Blue Salvia
Deciding between a seed pack and a live plant is the first fork in the road. Seeds require patience, consistent warmth, and a longer grow-in period before you see that first true blue spike. Live plants, especially those in #1 containers, give you a season’s head start and a much higher chance of first-year flowering. Beyond that, focus on genetics, root health, and the supplier’s shipping protocol.
Seed Genetics and Germination Reliability
A generic seed packet labeled “Blue Salvia” may contain a mix of Salvia farinacea, Salvia guaranitica, or even a dyed annual variety. True black and blue salvia (Salvia guaranitica ‘Black and Blue’) produces a specific dark calyx and intense cobalt flower. When buying seeds, look for a supplier that names the exact cultivar and sources from heirloom or open-pollinated stock. Customer reviews mentioning “germination rate” are your single most useful data point — a 95% germination report is worth more than any marketing description.
Live Plant Size and Root System
A #1 container (typically a 1-gallon nursery pot) should contain a plant that is fully rooted but not root-bound. The ideal specimen has multiple healthy stems and a crown that appears vigorous, not woody. Many sellers ship plants that are 6–12 inches tall, but the real indicator of future health is the root ball — if the soil is loose and the roots are white and branching, you are set. A plant that arrives with wilted leaves can often recover if the root system is intact and the soil is moist.
Shipping Conditions and Seasonal Dormancy
Live plants shipped during cold months (November to March) may arrive in a dormant or trimmed-back state. This is normal for many perennial salvias, but the packaging must still protect the crown from freezing temperatures. Reputable sellers use insulated boxes and clearly mark them as containing live plants. Seeds, on the other hand, are far less sensitive to temperature extremes but can be damaged by excessive heat if left in a mailbox. Always check the seller’s shipping window and your own planting zone before ordering.
Quick Comparison
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| Model | Category | Best For | Key Spec | Amazon |
|---|---|---|---|---|
| Live Salvia – Blue – 2.5 Qt Pot | Live Plant | Instant garden impact | 12″ tall x 6″ wide in 2.5 Qt pot | Amazon |
| Eden Brothers Blue Sage Seeds | Seeds | Budget seed starting | North American native wildflower | Amazon |
| Perennial Farm ‘May Night’ Salvia | Live Plant | Rich indigo-purple spikes | 18″ tall, indigo-purple spikes | Amazon |
| Perennial Farm ‘Blue Fortune’ Agastache | Live Plant | Deep blue with long bloom | 2-3 ft violet-blue spikes | Amazon |
| Perennial Farm ‘Moonshine’ Yarrow | Companion Plant | Yellow contrast to blue salvia | 18-24″ lemon yellow flowers | Amazon |
In‑Depth Reviews
1. Live Salvia – Blue – 2.5 Qt Pot
This is the closest you can get to a guaranteed head start without growing from seed. The plant arrives in a 2.5-quart pot at roughly 12 inches tall and 6 inches wide, giving you a substantial, rooted specimen that is ready to go into the ground or a larger container immediately. Because it is a live perennial, you will see blooms in its first season provided you plant it in a full-sun location with well-draining soil.
The supplier, The Three Company, ships directly from their greenhouse, and the packaging is consistently praised in reviews for protecting the foliage and keeping the soil moist during transit. Several buyers noted that the plants looked “minutes after unpacking” as fresh as if they had just been watered. The salvia is a member of the mint family, so once established, it tolerates drought quite well and requires only light fertilization at planting time.
A couple of reviews mentioned that the stated height of 12 inches was not always met — some plants arrived closer to 6 inches with no blooms. However, the majority of feedback is overwhelmingly positive, with multiple verified purchasers reporting A++ condition and healthy growth after planting. If you want the most reliable path to a mature black and blue salvia this season, this live pot is your best bet.
What works
- Arrives fully rooted and actively growing, saving 4-6 weeks of seed starting.
- Excellent packaging with very high buyer satisfaction on plant condition.
- Drought tolerant once established, which reduces maintenance.
What doesn’t
- Some shipments arrived shorter than the advertised 12-inch height.
- Occasional reports of plants struggling despite following care instructions.
- Limited to 1 plant per order, so mass planting requires multiple purchases.
2. Eden Brothers Blue Sage Seeds
If starting from seed is your preference, Eden Brothers is a trusted name in the wildflower seed space, and this blue sage packet is a solid entry-level choice. The seeds are heirloom, North American native, and suited for USDA zones 3 through 9, making them adaptable to a wide range of climates. The expected plant height is 36 inches, which is on par with the standard growth for many salvia species, and the blooms appear from late spring through early summer.
Customer reviews are a mixed bag, which is typical for seeds. One verified buyer reported a near-100% germination rate with very fast sprouting, while another buyer had zero seeds germinate. This variance often comes down to seed age, storage conditions before purchase, or the specific microclimate of the planting spot. The packet itself is on the smaller side — several users commented on receiving only 10 to 15 tiny seeds, which feels scant for the price.
Another important consideration is color accuracy. One reviewer noted that the flowers were gorgeous but looked nothing like the advertised photo, with pink buds instead of deep blue. If exact color matching is critical, you may be better served by a live plant from a known cultivar. For a budget-friendly seed-starting project with native appeal, however, this is a reasonable gamble.
What works
- Heirloom genetics from a reputable seed supplier.
- Broad USDA hardiness range (zones 3-9) for widespread adaptability.
- Fast germination reported by the majority of successful growers.
What doesn’t
- Very small packet with only 10-15 seeds per order.
- Inconsistent germination rates across different buyers.
- Flower color may not match the deep blue in the product image.
3. Perennial Farm ‘May Night’ Salvia
The ‘May Night’ cultivar is a 1997 Perennial of the Year winner, and for good reason. It produces deep indigo-purple spikes that rise 18 inches above the foliage during June and July, and if you cut it back after the first flush, you can trigger a secondary bloom in early fall. The color intensity is nothing short of stunning, making it a strong companion or alternative to the classic black and blue salvia.
Perennial Farm Marketplace ships this in a #1 container, meaning a fully rooted plant that is ready for immediate outdoor planting. The packaging is consistently lauded in reviews — buyers describe it as “speedy,” “beautiful,” and “sent with care.” One reviewer noted that the plant arrived scrunched but recovered fully within a day after watering, which speaks to the resilience of the root system. After a few months, that same plant had tripled in size and was still flowering.
There are occasional reports of plants arriving in poor shape, but these are outliers. The vast majority of feedback is positive, with many buyers noting the strong pollinator appeal — hummingbirds, bees, and butterflies are all drawn to these spikes. If you want a deeply saturated purple that holds its own next to blue salvias, this is a premium choice.
What works
- Award-winning perennial with intense, long-lasting indigo-purple spikes.
- Excellent packaging and plant condition reported by most buyers.
- Strong fall rebloom if pruned after the first flowering.
What doesn’t
- Cannot ship to several western states due to USDA restrictions.
- May arrive dormant or trimmed-back during winter shipping months.
- Occasional reports of plants arriving in poor condition despite good packaging.
4. Perennial Farm ‘Blue Fortune’ Agastache
Though technically a Mexican hyssop rather than a true salvia, the ‘Blue Fortune’ agastache is a close botanical cousin that produces the same deep violet-blue flower spikes that hummingbirds adore. The bloom window runs from July through September, giving you a solid three months of color when many other perennials are winding down. At 2–3 feet tall, it fills the mid-border nicely and pairs beautifully with darker blue salvias.
The plant arrives in a #1 container, and the packaging is again a strong point for Perennial Farm Marketplace. Multiple reviewers commented on the oversized box, thorough protection, and healthy soil moisture upon arrival. One buyer noted that the plant looked “just as good as those from a local nursery,” which is high praise for a shipped live plant. The fragrant green foliage adds an extra sensory layer to the garden.
The primary complaint is that some shipments arrive smaller than expected relative to the price point. A few buyers felt the plant size did not match the cost, even though the quality was excellent. If you prioritize a long, reliable bloom season and don’t mind paying a premium for a well-rooted specimen, this is a strong candidate. Just be aware that the flower color leans more violet than true cobalt blue.
What works
- Very long bloom season from July to September.
- Excellent packaging with high buyer satisfaction on plant health.
- Fragrant foliage and strong pollinator appeal.
What doesn’t
- Smaller plant size at arrival than expected for the price.
- Cannot ship to several western states.
- Flower color is more violet-blue than true black and blue salvia.
5. Perennial Farm ‘Moonshine’ Yarrow
While not a black and blue salvia itself, this yarrow is the best companion plant you can pair with one. The lemon-yellow flower heads, rising 18–24 inches above blue-gray silvery foliage, create a stunning color contrast against the deep blue spikes of a true salvia. The seller itself recommends planting it with salvias, black-eyed Susans, and fountain grasses, so the pairing is intentional and proven.
This is a #1 container plant from Perennial Farm Marketplace, and the reviews are nearly flawless. Buyers describe the plants as arriving in “perfect,” “excellent,” and “healthy” condition, often already blooming or on the verge of blooming. The packaging protects the foliage well, and the plant is fully rooted and ready for immediate planting. It is also highly deer resistant, which is a huge bonus in many suburban and rural gardens.
One important caveat: this plant cannot be shipped to several western states, including California, Colorado, and Oregon, due to USDA restrictions. If you live in one of those states, you will need to find a local source. For everyone else, this is a reliable, low-maintenance way to add a bright yellow accent that elevates the entire blue salvia border.
What works
- Stunning lemon-yellow color creates perfect contrast with blue salvias.
- Nearly flawless customer feedback on plant health and packaging.
- Highly deer resistant and drought tolerant once established.
What doesn’t
- Restricted from shipping to several western US states.
- Not a substitute for black and blue salvia — only a companion plant.
- Yarrow can spread aggressively if not divided regularly.
Hardware & Specs Guide
Container Size and Root Health
A #1 container (1-gallon pot) typically holds a plant with a well-developed root ball that is 6–12 months old. A 2.5-quart pot is slightly smaller but still offers a substantial head start over a seedling. The root system should be white, branching, and not circling the pot. Brown, mushy roots indicate rot or poor care during shipping. Always check the soil moisture upon arrival — it should be damp but not waterlogged.
Seed Viability and Germination Needs
Salvia seeds are small and have a short viability window, typically 2–3 years if stored in a cool, dry place. Germination requires consistent soil temperatures of 65–75°F and takes 7–21 days. Surface-sow the seeds with a light dusting of soil, as they need light to germinate. Using a heat mat and humidity dome can increase germination rates significantly, especially in cooler climates.
FAQ
What is the difference between Salvia guaranitica ‘Black and Blue’ and common blue sage?
How many seeds are typically in a packet, and is that enough for a full border?
Can black and blue salvia survive winter in cold climates?
Final Thoughts: The Verdict
For most gardeners, the black and blue salvia seeds winner is the Live Salvia – Blue – 2.5 Qt Pot because it bypasses the germination uncertainty and delivers a mature, flowering plant in its first season. If you want to start from seed and enjoy the process, grab the Eden Brothers Blue Sage Seeds for a native, heirloom option. And for a rich indigo-purple alternative that pairs perfectly with blue spikes, nothing beats the Perennial Farm ‘May Night’ Salvia.