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How often should I water?

Newbie veg grower here 😃
I have brassicas in a raised bed and also in a couple of containers, and tomatoes, potatoes and carrots in containers. 
My question is, how often should I water these?
The tomatoes have been in for 51 days and so far have plenty of leaves but only 3 tomatoes (and they are misshapen). The carrots have been in approx. 40 days and have a few tops but nothing much else doing. 
The brassicas are the plants from Fothergills and have been in for about a week (one of the containers has some that were put in about 50 days ago and have large leaves but no grouping as yet).
Potatoes been in approx. 40 days and flower buds have just started appearing - I have no idea what is going on under the compost. 
I have also just sown some peas directly into the raised bed. 
Up to now I have watered near enough daily (feeding  tomatoes weekly), but RHS site says only to water every 10-14 days (if there's been no rain).
I am so confused 😕
My grandad was a gardener and planted veg every year, unfortunately he passed away a few days before Christmas 2019 and I wish more than anything I had asked/ could ask these questions to him! 😔
Any help/tips regarding these plants (watering or otherwise) will be gratefully received.

Posts

  • Blue OnionBlue Onion Posts: 2,995
    I do a finger test.. stick your finger in the soil near the base of the plant and if it feels damp an inch down, your probably good to not water.  If it feels dry, then give a good soak.  For seedlings and young plants I will water once or twice a day depending on the weather.. as their roots are tiny and dry out quickly.  

    General advice is longer and deeper, but less frequent, watering is best as it encourages deeper root systems.  

    As you get more experience, you'll get a feel for it and understanding of how quickly your soil dries out as your plants mature across the season.  Some plants soak up the water quicker than others.. and temperature and wind play a big part too.

    That's why I find the finger test most reliable.  
    Utah, USA.
  • LG_LG_ Posts: 4,360
    I think the key to any disparity between the advice and what you're doing is down to the fact that your plants are in pots, so are likely to need more watering than plants in the ground. The finger test is a good gauge. 
    'If you have a garden and a library, you have everything you need.'
    - Cicero
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