Rate of Flow of Bubble Irrigation Systems for Rose Bushes

Bubble Irrigation Systems

• Bubble irrigation is used in water wise gardens because the amount of water used is limited but effective. Bubbler irrigation systems are set up in the same way as other water conserving drip systems. Tubing runs above ground from a garden spigot to the irrigation area. Emitters are affixed to the tubing. In the case of bubbler sprinklers the emitters are shaped in such a way that the water bubbles out of the tube in a circular spray. Bubble irrigation is recommended for large plantings like trees, shrubs and rose bushes.

Flow Rates

• Master gardeners from the University of Minnesota recommend 1 inch of water per week for young roses. The amount of water required for established roses depends upon the type of soil in which they are planted. Overall, deep weekly waterings that penetrate the top 18 inches of soil should be adequate. Bubbler sprinklers have adjustable flow rates. They can be changed from full flow to trickle by turning the nozzle. Rates of flow vary depending on the manufacturer but can fall anywhere between 2.5.gallons per minute (gpm) to 35 gallons per hour (gph). Adjust the rate of flow to suit the drainage rates of your soil. Lower the rate when water begins to pool or soil is saturated.

Benefits

• Roses are frequently damaged from overhead watering, especially when exposed to moisture at night. Night temperatures do not allow for evaporation and wet leaves provide a growing environment for bacteria, fungus and other pests. Powdery mildew is often caused from overhead watering. Bubblers are advantageous because they water the plant's base, protecting foliage from devastation.

Drawbacks

• Bubble irrigation provides slow watering which is beneficial, but only in soils which are capable of absorbing the moisture. Before installing any irrigation system check your soil's drainage to determine the most suitable system for your garden's growing conditions. Dig a hole about 1-1/2 feet deep and fill the hole with water. If the water drains out of the hole within eight hours then bubble irrigation is suited for your environment. If your soil is compacted and slow draining then consider overhead spraying in the morning. This is safer for your roses than the damage brought on by root rot and damping off, conditions which occur in roses planted in dense, slow-draining soils.