Blumat Classics/Bottle Adapters

Q: Do you need to soak the Blumat bottle adapters?

A: No, since they have a constant pressure, no need to soak.

Q: If Blumat Classic Juniors or XLs get air inside the lines or chamber, do you need to re-soak them?

A: No, you can just refill with water.

Blumat Tropf

Q: What does “Tropf” mean?

A: Tropf means drip in German and is a way of differentiating these from our “Classic” Blumats which are designed for houseplants. Tropf sensors act as dynamic moisture sensing valves with variable flow rates.

Q: Can I use Blumats with tropical and desert plants?

A: Yes - you can use Blumats with both tropical and desert plants. The best way to adjust for the differences is to extend or decrease the distance between where the Blumat drips and the sensor. The further away it is, the longer before the water will turn off. So for tropical plants, it's best to have it further away (4-5") and for desert plants you would want it much closer, maybe only 2-3." You can also adjust by turning the screw on the top

Q: What volume pot is one carrot designed for?

A: One carrot without drippers can water a 1-5 gallon pot. A carrot with some additional drippers offers the best coverage for 3-20 gallon pots.

Q: What is the minimum pressure required for a Tropf Blumat system?

A: The pressure required for Tropf Blumats with or without distribution drippers is 1 psi. The pressure needed for Tropf Blumats with Blusoak is 2 psi.

Q: I’m experiencing issues with my Blumats, they all stopped dripping, what could be the issue?

A: There could be a clogged pressure reducer or other component. Trace the system backwards until you find free flowing water.

Q: Are the distribution drippers adjustable?

A: Technically yes. However, we recommend to use the tropf sensor as the control mechanism for the drippers for best results.

Q: Do you adjust Blumats with distribution drippers differently than ones without them?

A: They are tuned the exact same way. Make sure to disconnect the 3mm line between the carrot and the first distribution dripper to find the “hanging drip.” Once that is dialed in, connect the distribution drippers again.

Q: In medium pots, is it better to add a second Blumat sensor or distribution drippers?

A: If you’re only at the point of adding one, it’s better to use two Blumats as insurance. If everything is dependent on just one and something gets clogged, crimped, or stuck; your plant won’t get any water at all. A second sensor acts as an insurance policy.” In larger pots though, it’s better to add distribution drippers rather than a sensor.

Q: Why use a 5” vs a 9” carrot?

A: 9” carrots are designed to be used in pots and beds with more depth. The two react to moisture levels at different depths of soil and respond appropriately. They work very well in tandem for larger pots and beds.

Q: In regards to a gravity system, how high do I need to keep my reservoir above where my plants are for a consistent flow?

A: If using distribution drippers or directly from the carrot, 1-2 ft min. If using blusoak, 5ft min. Click >here for more information.

Q: Can the gravity system line go over a slight increase before it drops to the system or will that disrupt the flow of water?

A: Yes. The total drop, from top of water column to top of soil level is the relevant distance.

Q: Do we need to soak and reset the Blumat sensors every time we disconnect them?

A: No, but it’s important to not let them dry out. If the soil gets too dry it will suck water out of the Blumat cone. You can prevent this by hand watering before disconnecting.

Q: Should I resettle/readjust the carrots every once in a while?

A: If your Blumats are performing well there is no reason to readjust the carrots. There is no need to recalibrate unless the reservoir goes dry or you are noticing issues.

Q: Can Blumats work in larger growing areas or farms?

A: If planting in native soil settings (in the ground) we tend to use different strategies above an acre of planted space. If planting in containers, such as raised beds or pots, there is no limit to the space that can be irrigated with Blumats.

Q: Will cover crops overcrowd or disrupt my system?

A: Generally no. Plants tend to grow around the Blumat system and incorporate the components into their organic structure in a symbiotic relationship.

Q: Can or should you “flush” with Blumats?

A: Our most experienced customers tell us that the main reason people need to “flush” water their plants is because they’ve over-fertilized. In recommended amounts of fertilizers that companies suggest on their products, they’re assuming that a high percentage of the nutrients will wash away with over-watering. In a properly dialed-in Blumat system, you won’t lose any of those expensive nutrients and will not have to flush. You will use 50- 75% less nutrients and this could pay for your total Blumat system in just a few weeks.

Q: Can I use a salt base nutrient mix in the reservoir to pull from?

A: Yes, provided that it is a fully soluble nutrient mix. Any particulate matter will clog the lines.

Q: Can I use nutrients in my reservoir with Blumats?

A: Click here for detailed instructions.

Q: Can I use Blumats in Coco and Perlite 70/30?

A: Yes. If you experience any issues, make sure to use a pure coco well to sink the carrot into. Too much perlite touching the ceramic can cause incorrect readings.

Q: Can you use Blumats in Coco coir?

A: Yes. Blumats love a coco based medium.

Q: What are some recommendations on cleaning out lines?

A: Use Drip clean for salt build up and Bio-film buster for organic build up. Click here for more information.

Q: Do you need to put saucers under pots when using Blumat Watering Systems?

A: Ideally it would not be necessary, however in case of unforeseen circumstances it is not a bad practice.

Q: Can you use PVC or another material and convert regular and Maxi Blumat sensors into longer versions?

A: Yes, you can make them up to about 19”

Blusoak/Capillary Mats

Q: How many feet of tape should I use, is there a minimum or a maximum?

A: Assume one foot of Blusoak for every square foot of growing area. However we generally don’t recommend blusoak in containers less than 30 gallons.

Q: When using a Cap Mat System can I use a flood tray?

A: Yes you can, but the bottom of the tray must be flat.

Q: Why have two carrots at each end of the Blusoak vs one one carrot?

A: Adding a second carrot increases the sensitivity of your system and generally improves results.

Q: Why do you use a distribution dripper in between a carrot and the BluSoak?

A: This gives you flexibility in placing your Blumat carrot. If you don’t want to use the distribution dripper, you can place your carrot closer to the Blusoak to ensure that it is accurately sensing the amount of water it is outputting.

Q: Can I bury my Blusoak, and if yes how deep?

A: Yes. blusoak tubing can be buried at different depths for different results. A mulch layer is useful stopping evaporation and conserving water.

Q: Do you recommend liners under the beds?

A: Pots and beds should always have adequate ability to drain. If water catchment is needed make sure the pot or bed is above it. When Blumats are properly tuned in they do not generally overwater to the point of run-off.

Q: I have a pinhole in the middle of my soaker hose, any easy way to fix this?

A: Use a blusoak coupler. Click here for more information.

Q: The pressure reducer is not letting much water through. When I detach the BluSoak hose, it’s just a slow drip of water - any suggestions on how to fix this?

A: Unscrew it and check the inlet side. There is a screen that tends to get clogged.

Q: Do the capillary mat systems work with pots over 2 gallon?

A: Yes, up to 5 gallons. Though the soil media needs to be at least 50% peat or coco. Click here for more information.

Moisture Meter

Q: I seem to always be having inconsistent readings with my moisture meter, it jumps from extremely dry to wet. I’ve tried recalibrating and putting coco coir in the hole, but it’s still really inconsistent. What is going on?

A: Click here for a guide to the Digital Moisture Meter.

Q: Would the Irrometer LT work in soils with lots of chunky expanded perlite, pumice, etc?

A: Yes. If inaccurate readings are suspected, used the coco/peat well described above.

Q: Is there a reason why the analog meters are so much more expensive than the digital meters?

A: The analog meters are made in a specialty manufacturing plant in Germany, and thus have a higher production cost. They also last longer and offer more consistent readings.

Q: What soils can you use with the Blumat Digital Moisture Meter?

A: Generally Soils that wick water efficiently, such as those high in coco,peat, or compost work the best with tensiometer meters like the digital moisture meter.

Q: Would the Irrometer LT work in soils with lots of chunky expanded perlite, pumice, etc?

A: Yes. If inaccurate readings are suspected, used the coco/peat well described above.

Q: How does the Irrometer LT work differently from the Blumat Digital Moisture Meter?

A: The measuring device is an analog gauge vs. a digital sensor. The Irrometer gives results more quickly.

Q: I just received the Irrometer LT and just wondering if it's necessary to soak in boiled water like your regular digital moisture meters?

A: The ceramic tips on the irrometers must be soaked for 30 minutes or so just prior to use just like the digital moisture meters.


Q: Would you recommend your products for a bag culture with fungi growing?

A: Possibly. We’ve used it in wood chip beds with great success. The trick is a consistent media surrounding the ceramic tip.

Q: What products do I need in order to set up a compost bubbler?

A: We have a kit with detailed instructions here.

Q: I’ve sent in a quote and haven’t heard back, what are the next steps or who should I reach out to?

A: We receive a high amount of quote requests, please wait for at least a week before reaching out to us.

Q: Do the grassroots fabric raised beds come with PVC to support the beds?

A: They come with the PVC fittings but not the PVC sticks.

Q: Any maintenance tips?

A: Check out our informational site at

Not seeing the question/answer you're looking for? We're happy to help! You can request a free design/quote here or reach out with any questions you have:


(888) 317-1600

Sustainable Village™ -Better Ways to Water
Regenerative Agriculture Since 1971 • Free Quotes & Consulting • Cutting Edge Products & Systems • Customized Engineering


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