Whole spices, not ground
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What ground spice does
It does not dissolve and it does not settle out either. It stays in suspension, which reads as a cloudy brine, and it continues to release color for as long as the jar sits, which means a product that looked acceptable on the day darkens on a shelf. Both of those appear in the published problem tables.
Why a bag rather than loose
Whole spices loose in the jar look attractive and are a reasonable choice. The bag matters when you want the flavor without the appearance, or when you are making enough that spice floating in a jar becomes a consistency problem between units. For a fermented product the bag also makes it possible to remove spice at the end of the ferment rather than at packing.
Strength and time
Whole spices extract more slowly than ground, which is usually the point, and it means the flavor of a fermented product continues to develop in the jar. Worth knowing when setting a date on a label, because the product a customer opens in March is not the product you tasted in September.
Where it becomes a cost
Whole spice is more expensive per unit of flavor than ground and that gap widens at volume. It is one of the few places in this craft where the correct choice is also the more expensive one, which is worth accounting for rather than discovering in a margin calculation.
Buy whole spice in bulk and grind nothing. Stored whole it keeps its strength far longer than ground does, so the unit cost comes down and the product gets more consistent at the same time.