The breeding pipelines from Sande and GSBGwill be combined and housed the state-of-the-art breeding
facilities of former Sande. In combination with Dümmen Orange’s modern breeding capabilities, this will
result in a superior offering to customers worldwide and bolster innovations, especially in the introduc-
tion of disease resistance and productivity traits.
We have invested in state-of-the-art storage facilities
for tubers with ozone treatment and optimized
conditions to improve tuber quality. In addition, we
control the quality
of the tubers before they are sent to customers.
The Netherlands is already the largest pro-
ducer of calla tubers in the world. Dutch calla
tubers have been used by customers all over the
world for both cut and pot use with year-round
planting schedule. The Netherlands offers the
perfect growing condition for calla tubers with
sandy loam soils and stable climate / tempera-
ture year-round. Our aim is to supply the
healthiest tubers from our own production as
well as the best growers in Holland.Calla.nl
is built on a strong history of
more than 200 years of experience
and knowledge (Geerlings was
founded in 1892, GSBG in 1901
and Sande in 1980).
This experience, heritage and passion
for customers and flower bulbs
combined with the commitment to
invest in new technologies make us
your confident partner to trust.
business creates the
global leader in the Calla breeding:
Geerlings’ experience in cultivation
and processing of different kinds of
Calla tubers, combined with the
established portfolio of products
from GSBG & Sande, and the leading
breeding programs from Sande &
GSBG (with genetics from Europe,
California and New Zealand).
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