Long-cycle greenhouse tomato is a demanding crop for a substrate, because it has to work for ten or eleven months. It needs enough water buffer that a failed irrigation does not cost you fruit, and enough air in the root zone that the same buffer does not suffocate roots in winter when uptake slows.
Growers running high-frequency drip on high-wire tomato generally want a substrate that holds moisture well without becoming saturated at the base of the slab, and that drains predictably so EC in the root zone can be steered rather than guessed at.
An 80:20 cocopeat-to-chip blend is our usual starting point for greenhouse tomato. It measures 6.73 L/kg water holding capacity and 10.2% air-filled porosity: a retentive base with enough chip to keep air moving through the slab.
A 50:50 blend, at 5.66 L/kg and 21% air-filled porosity, is the better choice where irrigation frequency is high, the climate is warm, or the crop has previously shown root problems in the lower slab. More air, less buffer.
Straight 100% cocopeat, at 7.32 L/kg and 5.2% air-filled porosity, holds the most water and is generally too retentive for long-cycle tomato under frequent drip, though it has a place in propagation and in low-frequency irrigation systems.
These are starting points based on the measured properties of each blend, not prescriptions. The right answer depends on your climate, your irrigation frequency and your drain percentage. Tell us those three things and we will suggest a ratio — including one that is not on this list.
Blending and packing are done to your requirement. The ratios above are reference points, not a fixed catalogue. If your crop needs 65:35, a particular particle grade, a slab length that suits your gutters, or a pack format and print that fits your handling line, that is what we produce.
Tomato growers rarely want a stock bag, because slab length has to suit gutter spacing and hole layout has to suit plant density. All of the following are made to order:
Full specification for our grow bag range, including all five blend ratios, is on the coco grow bags page. How we test and document each batch is on the quality page.
We are a manufacturer. Blending, compression, filling and packing happen at our own facility in Peravurani, Thanjavur district, Tamil Nadu. Visitors are welcome.
An 80:20 cocopeat to chip blend is our usual starting point, at 6.73 L per kg water holding capacity and 10.2% air-filled porosity. A 50:50 blend at 21% air-filled porosity suits warmer climates or higher irrigation frequency.
Yes. Compressed and expanded dimensions, planting hole count and spacing, and drainage hole position are all made to order. Tell us your gutter layout and plant density.
The 1:1.5 volume extract method. If your specification uses saturated media extract, tell us and we will supply the equivalent figure. The two differ by roughly a factor of two.
Our standard product is unbuffered, washed with water alone to below 0.5 mS/cm with no chemical treatment. Calcium buffering is a separate chemical process available on request, and for long-cycle tomato on automated fertigation it can be worth it, because it avoids a nutritional wobble in the first weeks.
Yes, and we would encourage it. Tell us the area and we will produce enough to trial properly, with the batch test report for that lot.
Other crops we supply: Strawberry · Cucumber · Capsicum & bell pepper · Blueberry
Our products: Coco grow bags · 5 kg blocks · Coco chips · 600 g bricks · Open-top bags · Coir fibre
Tell us your gutter spacing, plant density and irrigation frequency, and we will propose a specification.
Tell us your crop, growing system and volume, and we will propose a specification rather than send a brochure.
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