Jackie has a page on the website Hey Portugal which is for people living in Central Portugal. It’s full of advice and suggestions for growing things in the region: Na Horta
How to grow new tomato plants for free
When you’re removing the side shoots from tomatoes – don’t throw them all away. Keep some to make new plants. Simply put the side shoot into good compost and water well and it’ll turn into a new plant, smaller and stockier but there will be fruit. A great way to extend the harvest.