1. Wait 'til they're a bit bigger and pull them out by hand or use a hoe if able to do so without damaging other plants.
2. Don't dig the ground over again, could also try some form of mulch.
Also can grow basil, marigolds and oregano nearby, all helps withe the whole process. I would suggest a very weak solution of general purpose fertiliser to perk the plants up a bit.
Tomatoes don't really need insects to pollinate. their male and female parts are so close together a little shake of the plant every so often will be enough.
I have a 12'x8' and it is just set onto breeze blocks as put in the previous post. It has been up for MANY years (20+). OK, it looks slightly wonky now, but it still performs admirably.
The fabric is to stop the chemicals from the preservatives used on the sleepers lecching into the soil. This is for veg. growing so if you are only ever growing ornamentals in the bed there is no need. No real need to dig over the grass either unless you plan on growing root veg in there.
Slugs, mice or birds.
As it is only the petals though I would say not slugs. When do they get eaten? if at night probably mice, if in the day probably birds.
Let me rephrase slightly - is it OK to have a pumped supply to a bath?
My concern is that at some time only one supply (cold or hot) will be turned on, as opposed to a shower where both are always on. Will this cause damage to the pump if it is trying to pump against a closed tap - or do...