The easiest way is to make a former and wind wire around it to make wire hoops. Then you just stick the two ends in the ground over the plastic. Do not be too ambitious and buy sheets that are too long. Several shorter ones are more useful. And remember to secure them or the wind will take them!
Let this be a warning to anybody tempted to buy any sort of trap. Please work out beforehand what you are going to do with whatever you catch. This applies to squirrels, rabbits, rats, magpies and mice; or anything else.
I would suggest you do not plant a tree in the lawn. It will drive the person who does the mowing to distraction. Plant it in a border if you can.
Lemon grass, bought from a shop.
Before you do anything, decide how many plants you realistically need and take out the extras. Then proceed as above.
I would forget the bricks and just move in some pots of plants to put in the front of the pile. You will be glad you kept the pile when it has all rotted down.
Swifts were screaming round the house today. Wonderful sound.
Why don't you try Real Seeds next year. They positively encourage people to save seeds. Look at their site.
If you remove the female flowers how are you going to get courgettes? Many male flowers will grow before the females get into their stride. Patience is often required. You will not get any fruits unless the female flowers are fertilized; they will remain underdeveloped until they rot and fall off.