GramiGrow Knowledge
Practical guidance for trials with grass-wool growing media. Choose a product, understand the root zone and plan the next step after your crop.
01
A useful range starts with the grower’s task. For propagation, explore Seed Plugs, Plugs and Klapplug. For growing on, compare Blocks and Slabs. For specialty crops such as Phalaenopsis, discuss a specific configuration. For soil applications, explore grass pellets and soil improver. Confirm dimensions, composition, density, handling, availability and trial status for the selected product.
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Before sowing or planting, agree a wetting protocol for the actual grass-wool configuration. Wet representative units uniformly and compare their weights after the same drainage period. Check the whole unit, not just its surface. Record the batch, starting weight, water quality and method. Use those observations to refine the trial together with GramiGrow. A stone-wool recipe is not automatically a grass-wool protocol.
03
Organise propagation into clear observation stages: sowing or sticking cuttings, establishment, growing on and preparation for transfer. Record emergence or rooting, uniformity, root distribution and handling at each stage. When transferring a plug into a block or a block onto a slab, check physical contact and new root growth. Adjust irrigation to the plant’s development and the measured response of the product.
04
Root-zone management connects the crop, growing medium and greenhouse climate. Follow light, plant size, irrigation events and drainage together. Weighing representative units can help track changes during a trial. For sensors, confirm a calibration suitable for the chosen grass-wool product before interpreting readings as absolute water content. Set irrigation triggers from observations and validated product guidance; use neither a universal interval nor a borrowed substrate target.
05
Electrical conductivity indicates the total concentration of dissolved ions. It does not identify individual nutrient ratios. Measure the feed and appropriate root-zone or drainage samples with a calibrated instrument and a consistent sampling method. Interpret trends alongside water quality and, where needed, laboratory nutrient analysis. For grass-wool trials, assess the specific fibre mix and binder when developing a nutrition programme.
06
pH influences nutrient availability. Compare samples taken by the same method at consistent moments; a feed sample and a root-zone extract are different measurements. Calibrate and maintain the instrument according to its manufacturer’s instructions. Agree product-specific interpretation with your crop adviser and GramiGrow. Do not transfer numerical stone-wool targets directly to an organic grass-wool configuration.
07
Use clean trays, tools and irrigation equipment. Keep batch references and record storage conditions before planting. Organic growing media require their own evaluation of material and microbial behaviour; beneficial biology or pathogen freedom should not be assumed. If recirculating drainage, discuss filtration, water treatment and monitoring with a qualified system specialist. Check the treatment’s compatibility with the crop, nutrient programme and product.
08
Define the crop, cultivar, format and question before starting. Compare with a relevant reference medium and document any differences in irrigation. Track rooting, uniformity, plant growth, handling, water input, drainage and end-of-life separation. Keep photos at fixed moments. Request the current technical information for your batch: composition, dimensions, density, wetting guidance, storage, development status and agreed recovery route. Finish with a joint review and a clear next decision.
09
GramiCycle distinguishes compostable configurations from products with components requiring a return and recovery route. Product composition determines the route. Confirm the accepted condition, separation, local partner and logistics before the trial. Home composting is only a route where the specific product supports it. Explore the two cycles and practical questions on the GramiCycle page.
Discover GramiCycle →Grodan’s knowledge structure informed these topics. Its technical recommendations concern stone wool; the text above is an original adaptation for grass-wool trials, not a GramiGrow specification.
Innovation
Our development direction connects growing media, fibres, protein and the next life of materials.
Peat-free growing media, developed around the grower’s application.
The fibre platform: grass preparation, fibre quality and processing for growing media.
A research direction exploring protein recovery from grass juice alongside fibre production. Separation, quality and applications require validation.
Designing the next step from the beginning: compost suitable products or arrange recovery with GramiGrow and participating partners.
Grass → pressing → fibre for growing media + juice for protein research. Remaining fractions are assessed for suitable nutrient or soil applications.
Tell us your crop, application and current growing system. Together we can define a product configuration, measurements and an end-of-life route.
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