Water demand garden/year --> Is a cistern worthwhile?

There are types of grass that do not root deeply. Even deep-rooting grass looks burnt after 3-4 weeks of drought and heat. It is also a question of requirements. If I invest a lot of money and own effort into the outdoor area, I want to maintain it and have it look good.
If I have free rainwater for it, then it is no problem.
It is nothing more than a hobby.
And 1,000 liters is nothing. That is what some newly planted trees need in 2 weeks.
For example, we have installed a 76,000-liter cistern.....
For most gardens, around 7-8m3 is certainly the range that makes the most sense.

We already had the discussion about garden water demand ... I consider this 20l/sqm to be wildly exaggerated. Especially since a part usually comes from precipitation, i.e. it is not a suitable planning figure for consumption forecasting. Irrigation systems in hedges etc. are regularly unnecessary, you only pamper the plants with them. The establishment phase is of course important, as is with a new tree, but permanent irrigation is the wrong approach in my opinion.

20l/m2 includes precipitation for a shallow-rooted lawn with optimal care. 10-20l is also sufficient. Most people won't even fertilize their lawn... As wrote, you shouldn't coddle the plants too much. Only then do they root deeper and become more resistant to dry periods. Since we will probably have more dry periods, I would plan accordingly. I don't want to sit on my terrace and see all the plants in the garden suffer or die... I don't see the point in using fresh water and it also costs accordingly.

: 76000 liters? Or 7600 liters?

76,000 liters

Hi,

Tell me, do you all really need golf-course lawns in your gardens or do you have 4000 sqm plots?

Neither, but it really depends on the location. In the North German Plain, the issue of irrigation has to be assessed differently than here. We live in Franconia, one of the drier areas in Germany. We use about 150 m^3 of water every year on about 350 m^2 of garden. Irrigation has been running since early April! Cisterns are completely useless here; some neighbors have them, but they are usually already empty in April and remain so until late summer.
We pay 2 euros/m^3 for our garden water, so about 300 euros per year. For a large cistern including installation and technology, you quickly get to 5k€ and more.
And with a cistern you still have to install filters and change them regularly so that suspended solids don’t clog your sprinklers.
So it’s not worth it. Most neighbors also clearly say they wouldn’t do it again.

Best regards,
Andreas