About the catnip.....amazingly easy to grow. Put all the seeds, as spread out as poss, into a large plant pot. Use multipurpose compost and water well. Make sure the seeds are sprinkled on the top and have just a light covering of compost.
Leave in a warm place for a week or more. They will germinate. Leave them to grow.
They grow quickly, like mint, and are very easy to take cuttings from. Separate them into separate pots if they grow very large, though it is my experience that they like being crammed together, even though gardening books suggest otherwise.
If you want more plants, take cuttings from the ones you have, cut them just underneath a 'knob' on the branch, and plant in its own pot, it'll soon start growing.
Soon you'll be overwhelmed with the stuff.
Put the strongest plants in the garden, but beware, they can take over like mint does.
Dry some leaves, branches, and flowers in PAPER bags and use these for cat toys, or just sprinkling around for your cats to get 'high'