The following documents from CSU and affiliates can help fine tune your answers.

 Deciduous shrubs   https://extension.colostate.edu/topic-areas/yard-garden/deciduous-shrubs-7-415/

 Hydrangeas    www.botanicgardens.org › blog › hydrangeas-colorado

  Growing raspberries in the home garden | UMN Extension

  extension.umn.edu/fruit/growing-raspberries-home-garden

 Raspberries for the Home Garden-7.001

 extension.colostate.edu › topic-areas › yard-garden

    There are several management methods you can employ to help gauge the water needs in connection with your specific gardening situation. To test the soil moisture content you can use the hand method of digging in the soil to check moisture content.  Is the soil powder dry, medium moist or even muddy?    The ease in which you can probe the soil can tell you a lot about the water content.  A long screwdriver can help with this.   It can help show the moisture depth of the soil.   There are also soil moisture meters that are available but they are not always accurate.   You can also plant what is known as a water indicator plant that will wilt when the soil moisture is low, such as whitesnake foot.  A soil depth of 6 to 12 inches can support the plants after they have established after the initial planting period.

 Lilacs have a low to medium water needs.

Hydrangeas are not necessarily a low-water plant, but they can be used in the landscape quite effectively, grouped with other plants that have similar water requirements.  Grouping plants in a landscape with similar water needs is called hydro-zoning and is a design technique that can reduce your overall cost to maintain a landscape.  
In our climate, Hydrangeas grow particularly well in North and East-facing exposures.  It is best to avoid Southwest, or Western exposures.  The Annabelle variety is the shrub with large white flowers that you may have seen around town.  They can cope with western exposure  in the landscape, with a little shade.

Raspberries need more water during the fruiting season.  

Shorter more frequent watering will allow the soil to absorb the water and make better use of your water.   Soil should be moist in lower depths but not soggy.  

There are many extension documents about gardening needs at the Weld County Extension office

https://www.weldmastergardeners.org/     There you will find lots of information that is easy to use.  

Thanks again for a great question.   If you have any other questions that we can answer for you, please contact us.

Susan

Weld County Mastergardener 

Hi Weld County,

Question #0021327 has been assigned to you by CSU E.

Water requirements

Is there any kind of guide that gives how much water different types of plants need from a drip irrigation system? For example, Lilacs, Hydrangeas, raspberries, etc.

From: Gary J Eifert
Submitted: 05/21/2021 8:05 PM

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