Growers looking for a slab offering perfect rooting that guarantees optimal growing results need look no further than the multi-season Flortop Rosa. Thanks to its unique hydrophilic fibrous structure, the plant roots use the entire substrate volume, so you get not only a fully rooted substrate but also outstanding root colour and quality.

  1. Perfect Control in Every Season – Flortop Rosa has a very wide control range. With its prompt re-saturation, the WC can quickly be topped up to the required level after a temporary drop (from 50% to 73% in 24 hours). The special fibre structure ensures that there is always plenty of air in the substrate, and the WC and EC can easily be varied based on the climate and needs of the crop.
  2. Perfect Root Penetration – Thanks to the unique properties of the slab, the roots use the whole substrate volume. After the last cycle, water and nutrients are distributed uniformly throughout the whole slab. This perfect balance between water and oxygen results in a noticeable increase in root development at the top of the substrate. This lays the foundation for a vital, vigorous and resilient crop – with better disease resistance. This is particularly beneficial for moderately rooting cultivars, which perform significantly better with Flortop Rosa.
  3. Better Plant Balance in Every Growing Phase – Even with a relatively low WC, the uniform water distribution keeps the top of the slab sufficiently moist while the bottom layer does not get too wet. This enables the roots to absorb water and nutrients throughout the slab. Despite differences in plant loads – whether the plant is about to be or has just been cut – the WC and EC are always more homogeneously distributed in Flortop Rosa than in other slabs. This results in a more uniform crop with better growing power.
  4. Optimum Re-saturation, Less Draining – Flortop Rosa has excellent water control properties. The feedwater throughout the slab is replenished efficiently, even with slow drip irrigation, and ensures a consistently low drain percentage. Furthermore, the EC in the slab remains stable in any changes of weather, avoiding unwanted fluctuations and uneven control.
  5. Sustainable Use of Water and Nutrients – Grodan next generation fibres are completely inert and do not bind nutrients or crop protection products. They do not need to be rinsed at the beginning of the growing cycle. Drained water can be reused in its entirety – after disinfection, of course – right from the start of the growing period. The substrate does not bind nutrients or crop protection products, so it is always easily absorbed by the plant. This ensures efficient use of water, nutrients and crop protection products.

Flortop Rosa is the most controllable stone wool slab for the professional rose grower. Our next generation fibre technology is ideal for precision growing. It allows intentional control of both the root environment and greenhouse climate together to achieve optimal crop development all year round. Flortop Rosa delivers uniformity, homogeneous root development and high irrigation efficiency, so no water or nutrients are lost.

  • Multi-year slab, specially developed for rose growing
  • Sturdy, UV-resistant foil for multi-year use
  • Improved fibre structure for extra firmness
  • Optimal water distribution throughout the whole slab, including at the top

Flortop Rosa is the ideal slab for demanding rose growers aiming for a permanently vigorous crop. To achieve this, the water content (WC) and EC in each cultivation phase need to be actively controlled in line with the climate regime and the development phase of the crop. This results in consistently higher top-quality yields that maximise returns.

Remco van Heijningen from Westmere Roses in Almere in the Netherlands has been growing the grandiflora (large-flowered) white rose ‘Maroussia!’ since June 2008. In an interview, Van Heijningen said the following about Flortop Rosa.

“I opted for Flortop Rosa due to the low plant density of six plants per meter square. Consequently, only three tricklers are positioned on a 100 x 12 x 75 slab, whereas the norm is four. The expectation is that the water distribution over the depth of the slab and between the plants is optimised due to the unique hydrophilic fibre. The measurements taken so far seem to confirm this.

The distribution of the WC – measured over the depth of the slab – was very homogenous. The roots were visibly present in the upper layer of the slab. I believe this is quite uncommon in roses, particularly in the ‘Maroussia!’ cultivar.”

In the longer term, rose growers expect perfect water distribution and increased uniformity and homogeneity.