Prioritize Germination Rates and Seed Viability
The most critical factor when purchasing seeds by mail is the guaranteed germination rate. Unlike a potted tree, which has a visible root system, a seed is a dormant organism. High-quality seed suppliers will provide a percentage estimate (e.g., 80% or higher) based on recent testing. Be wary of extremely low prices, as these often indicate older stock with diminished vigor. Look for suppliers that provide 'lot numbers' or harvest dates. Fresh seeds are significantly more likely to sprout than those that have sat in a warehouse for several years. For many tree species, such as oaks or walnuts, the window of viability is relatively short, making the freshness of the batch paramount.
Consider Your Hardiness Zone and Microclimate
A common mistake in mail-order gardening is selecting a species based on its aesthetic appeal rather than its environmental compatibility. Before clicking 'order,' you must verify that the species is rated for your specific USDA Hardiness Zone (or your local equivalent). A tropical fruit tree seed may arrive looking beautiful, but if your winters involve frost, the seedling will not survive its first year. Beyond temperature, consider your soil type—acidic versus alkaline—and your moisture levels. Some tree seeds, like those for certain conifers, require well-draining sandy soil, while others may thrive in heavy clay. Matching the seed to your microclimate is the difference between a thriving tree and a wasted effort.
Evaluate Seed Treatment Requirements
Not all tree seeds are 'plug and play.' Many woody species have evolved complex dormancy mechanisms to prevent them from sprouting at the wrong time of year. When browsing, look for descriptions that mention 'stratification' or 'scarification.' Stratification involves a period of cold, moist conditions (simulating winter) to trigger germination, while scarification involves nicking the hard outer shell to allow water penetration. If you are a beginner, you might prefer species with easy germination profiles. If you are an experienced grower, you may seek out challenging species that require specific seasonal cycles to wake from dormancy.
Sourcing and Ecological Integrity
When buying tree seeds, consider the origin of the genetics. For reforestation projects, it is vital to source 'native' seeds that are appropriate for your specific region to avoid introducing invasive species or disrupting local ecosystems. Furthermore, check if the supplier practices sustainable harvesting. High-quality seed companies often collect their own seeds from healthy, wild populations rather than relying on mass-produced, genetically uniform commercial stock. This genetic diversity is crucial for the long-term resilience of your trees against pests and changing climate patterns.
Growth Habit and Long-Term Intent
Finally, define your goal. Are you planting for privacy (fast-growing evergreens), food (fruit or nut trees), or aesthetics (ornamental flowering trees)? Fast-growing species often have weaker wood and may be more susceptible to wind damage, whereas slow-growing hardwoods tend to be much more durable and long-lived. Always read the projected mature height and canopy spread in the product description to ensure the tree won't interfere with power lines, your home's foundation, or your neighbor's property in twenty years.
