Decided to grow tomatoes in grow bags brought over by daughter. Haven’t a clue what I am doing! Have all the stakes in but it’s the watering that’s bothering me. How do you tell when to water. They all look well and have flowers on and are now about18 inches high. My late husband always grew them so I’m trying to keep on They are in a greenhouse Grateful for any advice
Hello a warm welcome to the gardening thread.
As for watering keep the soil moist, check by putting your finger in the soil down to an inch.
How big are the bags and how many plants in them?
Post the variety of the plants as there are basically two types of tomatoes 
and need to be maintained differently.
First garlic 
of the year, it looked as if it needed pulling, more leaves lellowing than green, I suspected leaf minor but no just coming to the end of the part of life span. Small but love fresh garlic.
First picking of broad beans.
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Three plants in each grobag. Three in big pots. Three are bush type. Doing the finger thing The non bush ones are called Fandango. Lost label for bush ones but they are cherry type fruits. I have put stakes in but might need sturdier supports as fruits will make them heavy. Would be so nice if they are a success
Not Carlos Fandango ? You’ll have to watch them. They go like rockets 
The three bush type sound like determent plants so very little to do. They grow to a determent height / size & the crop will ripen +/- at the same time.
I looked up Fandango they are indeterminate, so will grow on & on. With these, you’d be better off if you prune the brutts (les gourmands in French) off (the side shoots that grow from the stem.
Keep the soil moist this will help prevent bottom end rot, which is mainly caused by the plant not being able to take up calcium.
You may need to feed the plants with a liquid tomato fertiliser after the 2nd month.
If you have any more questions, there are a few knowledgeable gardeners here.
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Well done! I’m looking at my garlic with a bit of despair as they are very covered in rust again this year! I think the very wet spring just hasn’t helped. I’m trying to keep them going until June to let them bulk out a bit as if not I fear they will be around the same size as yours and I already didn’t plant enough this year as it is without having small ones to boot!!!
I’m in pain today as did a lot of planting and bed prepping yesterday. Aubergines, peppers and a chilli in. Bush beans planted (well some, need to get another 10 in I think if what I read of 10 plants per family member is correct). My big bed along side the hoop house is also now weed free and dressed with some poo, still need to get a layer of compost over it as well but gave up at 7.30 last night to jump in the spa for my poor hip! Also laid out much of the irrigation pipe. I’ll need to buy more, no way do I have enough for all the beds. It is drizzly today and I need to go to work this afternoon so a good excuse to take it easy!
Really hoping I haven’t expanded too much this year! I did that early on and ended up overwhelmed by weeds and not able to keep up with watering and gave up for a few years entirely! Now I’m doing no dig and have automated irrigation I’m hoping that things will be easier to go bigger.
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Can you maybe advise on why some, not all my tomatoe plants in grobags have top leaves curling. Watering? I have some fruits on now so should I be feeding? Thanks
Have you checked for aphids? They can damage new growth.
Hello Sue. No aphids. It has rained here all day and they look a bit perkier tonight. The curly ones get full sun all day in the greenhouse so maybe it’s that. I googled it and it can be over or under watering! How to know which is the problem. Also need to lookup when to feed as there are some fruits now. Thanks for your reply
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Too hot - too cold - underwatered - too much Nitrogen (too many leafs and not enough other nutrients). Tomatoes just sulk at any mild slight. They,re not yellowing so its probably water or heat.
Mine are currently refusing too grow until it warms up - yours actually look quite healthy
Just keep an eye on them It could be just young leaves suffering in the sun, quite possibly a natural reaction but…
If the growbags came form the UK they’re normally full of nutrition for at least 2 or more months for tomatoes. One of the major problems with growbags is drainage if you haven’t punched drainage holes in the bottom so be careful when watering especially when the plants are young.
When you do start feeding do so when the plants need it & don’t over do it as you’ll stop the plant growing, the plants will be overwhelmed & block nutrient uptake.
Yes have made drainage holes in them and they did come from uk and are supposed to have enough nourishment for up to 8 weeks so will hold off on feeding for a few weeks yet. I find the watering hard to get right. It gets so hot on sunny days in there even with door and roof window open. Thanks for advice
At this time of year just keep them moist not wet they don’t need a lot of water. Punch a hole in the bag between the plants a do a finger check, push finger down to +/- 1" & 1/2", if moist don’t water. Being in a plastic bag they retain moister.
I’m not into greenhouses, so you will need better info from those who are, but I seem to remember greenhouses need white washing in summer to reduce the amount of light. Have you done that? Please can someone else confirm what and when. Thanks.
Moved
What’s this Lidl offering gardening télépéages badges? 
Oops wrong thread. I’ll port it
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With all the rain we’ve had the past 4 days, and more to come, keeping them just moist outside is a bit of a challenge 
. My toms and cucumbers are suffering as well. On the other hand, the peas, butternut and sweet potatoes seem to love it 
