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Climate control, a must for indoor gardening

The PLUG'N'GROW products line offers all types of horticultural electronic controllers required for indoor gardening. Most of our products detect lighted and dark periods and use the proper settings to perform their control task. We also offer combined controllers that outperform the single task controllers when it comes to plants comfort and development performance. Our products are used by beginners, intermediate and experienced indoor gardeners since 2001.

# Produit Article
03091000 PNG Dry Switch Relay (IGS-DCS)
03091001 PNG Precise Cycle Controller (IGS-011)
03091002 PNG High Temp Thermostat (IGS-012)
03091003 PNG Flex Cycle Timer (IGS-015)
03091004 PNG Day/ Night Temp (IGS-021)
03091005 PNG CO2 Smart Controller C/W HT (IGS-061)
03091006 PNG CO2 Smart Controller C/W AUX (IGS-100)
03091007 PNG RH/ Temp Smart Controller / Probe (IGS-100S)
03091008 PNG RH/ Temp Smart Controller (IGS-111)
03091009 PNG C02/ RH/ Temp Controller (IGS-220)
07500150 PNG 4 LIGHT LOAD SWITCH 120/120V ILS4-121
07500151 PNG 4 LIGHT LOAD SWITCH 240/120V ILS4-121S
07500152 PNG 4 LIGHT LOAD SWITCH 240/240V (ILS4-241)
07500153 PNG DELAY FOR ILS4 (ILS4T-1)
07500154 PNG DELAY FOR ILS4 2X (ILS4T-2)

Additional Info

Climate control, a must for indoor gardening

By indoor gardening, we mean growing plants in a closed and controlled environment. This concept of closed and controlled environment also applies to greenhouses or any grow room size, either a closet or a warehouse. In any of these situations, the grower wants to optimize growing conditions to maximize the plants yield, thus maximizing the dollar return. Often hydroponic automatic irrigation techniques are used to ensure on time water and nutrients intake by plants. Electronic horticultural controllers are the best equipments to suit all plants' needs to obtain the best results. Adequate climate control promotes food nutrients uptake by plants for faster growth and better quality yield. Plants act like high level athletes when all their needs are satisfied.
Plant's development ingredients

Plants need light, water, nutrients and other materials drawn from the gas mixture we call "air" to build the vegetal cells through photosynthesis. Carbon dioxide (CO2) holds the carbon building block required by all plants. For the light part, plants are simple: when there is light (HID: High Intensity Discharge mostly used indoor), plants feel it's daytime and photosynthesis may operate regardless of the hour shown on the clock. When it's dark, plants feel it is night and time to complete the tissue building process and expel by-products or surplus. This night or dark period of a minimal duration is very important to plants. Also, some species need a minimum time of continuous darkness to flower.
Keep the stomata open !

Plants have failsafe mechanisms encoded in their DNA to survive the ever changing climate conditions in a natural outdoor environment. They have narrow comfort zones relative to temperature, relative humidity (RH) and others. These comfort zones are different for lighted and dark periods. Plants are sort of moody when it comes to climate conditions. Thus, electronic horticultural controllers with the proper narrow comfort zones settings are recommended.

The plant breathes through stomata mainly located at the lower surface of leaves. These stomata act like two-way valves to let air in and expel unwanted gases and water vapour from transpiration. When one climate condition is threatening to damage part or the whole plant, the stomata close. Even if light, water, and nutrients are available in abundant quantity and quality, when the stomas shut, the photosynthesis stops, hence the growth and the blooming. The plant maturation stops until the climate variable that caused the stomas to close gets back in the appropriate range for the plant to operate photosynthesis and growth.

So climate conditions are important to plants, and climate control in a closed environment is a must. If temperature is too hot or too cold or the relative humidity too low, growth stops. When relative humidity is too high, then transpiration is slowed, so water and nutrient absorption slows accordingly. Relative humidity going too high is also a concern because of the risk of pests like fungi and bacteria that will attack plants if allowed to develop.
Essential equipments for indoor gardening

The essential atmosphere variables to control in indoor gardening are light and darkness durations (photoperiod), temperature, relative humidity and carbon dioxide (CO2) availability. Also, nutrients solution on time watering is needed. Thus, the required controllers are:

    lighting timer;
    repetitive cycle timer ("cyclestat") to repeat watering sequence as needed;
    horticultural thermostat "tempstat";
    horticultural humidistat

Many experienced growers choose to enrich the air in CO2 by using a "sniffer" or "PPM controller" and an appropriate CO2 producing equipment, wether a generator or regulator.

Horticultural controllers might be specialised for one task or a few may be combined into a "multi" or "complete" controller. The later ones are more expensive but are far better at managing plants' comfort and energy efficiency by avoiding opposite processes like venting while heating. The above horticultural controllers manage the garden essential equipments:

    lighting equipments for the proper lighted and dark periods;
    watering pump(s) for the right duration and repeat cycle;
    fan, air conditioner or heater to maintain temperature;
    fan and/or dehumidifier to lower relative humidity (RH);
    humidifying equipment;
    optionally, a CO2 enrichment equipment (bottled CO2 or gas burner).

Happy and fruitful gardening!