Reading the catalogue hierarchy as a sourcing map

The wholesale catalogue is built as a hierarchy: a seed group at the top, then species, then named varieties inside each species. For a retail buyer this ordering is more than navigation. The number of varieties listed under each species shows where supply is deep and where it is thin, and that distribution is a useful first signal for deciding where to concentrate a sourcing plan and where a specific unlisted variety request may be the more practical route.

What the three levels actually represent

The top level separates broad seed groups such as vegetables, flowers, herbs, and microgreens and sprouts. The next level is the species or species hub, for example Brassica oleracea or Eruca sativa. The third level is the individual named variety with its own reference. Read downwards, the hierarchy narrows from an assortment category to a botanic identity to a single sellable item. This matters for sourcing because each level answers a different question: the group tells you which part of your shop the range belongs to, the species tells you what you can offer within it, and the variety tells you what a customer actually chooses from the shelf.

Variety counts as a breadth indicator

The published counts attached to species hubs are the clearest available signal of depth. In the microgreen group, for instance, Brassica oleracea shows 41 varieties while Amaranthus blitum shows one and Tropaeolum majus shows one. Brassica rapa, Beta vulgaris, Foeniculum vulgare, Eruca sativa and the two Rumex species sit between those extremes. Read as a sourcing map, this suggests that a supplier with dozens of references under one species is likely to be a practical source for that species across a season, whereas a species with a single variety should be treated as a narrow offer rather than a category you can build an assortment around.

Where broad groups are thin, plan around the species

Some group headings exist as catalogue structure without a populated range beneath them. The microgreens and sprouts category, for example, is described as a trade catalogue of seeds listed in that category, yet the sprouting side shows no species entries at the time the catalogue text was published, while the microgreen side carries nine species hubs. This is useful when planning: the presence of a category label does not on its own promise breadth. Before you build a range plan around a group name, check which species beneath it actually carry varieties. If the sub-level is empty, your sourcing plan should not depend on it.

Reading horticultural labels alongside botanical ones

The hierarchy is not always consistent in its labels. In cabbage and kale, some records use horticultural group names such as Brassica greens, while others use fuller botanical labels including Brassica oleracea convar. acephala and its curly kale form, and one entry appears under a trade-style name rather than a species. For sourcing this means the depth of a group cannot be read from a single species count alone. Two entries that look similar at group level may be different selections with different leaf types. Treat the variety level, with its reference number, as the unit you actually plan around, and let the species or group label guide you only to the right shelf area.

Deciding where to concentrate effort

Put together, the hierarchy suggests a simple prioritisation. Species with many listed varieties are the ones where a standing range is easiest to build and where substitution within the species is possible if one reference is unavailable. Species with one or two varieties are better treated as accent lines that depend on that specific reference being available. Groups with no populated species beneath them should be left out of a firm plan until depth is confirmed. This lets you sort your intended range into a core tier that rests on species with real catalogue depth, and a secondary tier that rests on single references and therefore carries more availability risk.

When an unlisted variety request is the better route

Where the catalogue shows a species but not the variety your customers ask for, or where a group label is broad but the sub-level is thin, the hierarchy itself points to the alternative. The supplier invites enquiries about varieties that are not listed, given the botanical or variety name, the quantity and the destination. That route suits a species already represented in the catalogue where you want a different selection, or a species with a narrow published range that you nonetheless want to stock more widely. It is a weaker fit for a whole category that is empty at the species level, because there is no evidenced basis for assuming supply.

What the hierarchy does not tell you

The organisation and variety counts describe the catalogue, not the goods. A placement in a group does not establish that a lot is cleared for direct consumption or for sprouting, and a listed weight-based price is not a statement about seed count or germination for a particular batch. Availability, pack sizes and final prices are settled in the quotation. Use the hierarchy to decide where to look and where to ask, and use the quotation to confirm what can actually be supplied for the reference and destination you have chosen.

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