When sourcing olive oil seeds (primarily for oil extraction or planting), you must prioritize oil content percentage, moisture levels (ideally below 9%), and purity rates (minimum 98%). Ensure the seeds are free from mold, fermentation, or insect damage, as these factors directly impact the acidity and sensory profile of the resulting oil. For planting purposes, verify the germination rate (typically >85%) and the specific cultivar (e.g., Arbequina, Picual, or Koroneiki) to ensure suitability for your local climate.