Create your Custom fields in Virtuemart

Go to Components > Virtuemart > Custom Fields and press New. Then as Custom Field Type select “Plug-ins”. Fill in the rest fields till the end of the page.
The Is a list field has to be disabled

In the “Select a plug-in” select “Dependent Custom Fields For All”

customfield creation

After selecting the plugin type, the parameters of that plugin will be loaded.

customfield creation params

The correct configuration of the plug-in is essential to the plug-in's behavior in the back-end and the front-end of your site. So it follows an explanation of the settings found here.

If you are using the custom field just to assign attributes for filtering, we suggest enabling the hidden setting. By setting the field as hidden, your products will load much faster, in the front-end.

There is a known bug in Safari browser regarding the hiding of the values in the drop-down lists.

Parent Custom Field: The custom field upon which this one depends.
If this is the 1st level/root custom field, leave this field empty.
Data type: This is used to validate that the inserted data will be of a specific type.
- String/Text allows any input
- Color Hex. (Hexadecimal) allows only colors in hexadecimal format.
  If you select this, a color picker popup will be displayed when you will try to insert a new color.
- Integer Number allows only integers e.g. 10
- Float Number allows decimal numbers e.g. 10.45
Display type: It defines how the custom field will be displayed in the front-end of the site i.e. Buttons ,Color Buttons, Drop-down lists, etc.
Required: Leaves the field without selection and prompts the user to select an option if he/she tries to add the product to the cart.
Price Variant: Set this to Yes only if your custom field values will affect the price of the product.
Display only in product details: In case you assigned a lot of custom field values to your products, you are advised to display them only in the details page. This way your category pages will be lighter and faster.
Display Price : This setting has meaning only if the custom field is price variant.
It indicates how the price of each custom value will be displayed in the front-end of the site.
Values : This section displays all the values of that custom field. You can insert the values you intent to use now or later from within the product form.

You are advised to first save your custom field and then insert the values. This way you will be able to take into account the selected parameters.

customfield creation w parent

If your custom field has a parent, you have to select a parent value when you add a new value.