Saving Seed

We save our own seed wherever possible. This works really well for most vegetables and flowers. 
Don't try to save seed from F1 hybrids. 
Do choose the best plants to leave to go to seed (always breed from the best stock available!)
Bear in mind that some things may cross fertilise if there are flowering plants available of other varieties to cross with.  This includes wild varieties like wild carrot. Squashes and pumpkins particularly will cross breed between the varieties you are growing - sometimes produces interesting new varieties! Seed saved from plants that are hybrids my not turn out like their parents. You can save your own potatoes seed if you have had no problems with disease in your crop, best to use fresh bought seed every few years.
With things like leeks, carrot, onions, a few plants need to be left in the ground for the next growing season after the crop is harvested to complete their flowering cycle.  I always leave a couple of plants from any of the salad family and brassica family plants for seed. They can cross fertilise if they are in flower at the same time but if you like to experiment this can lead to interesting new plants . 
Store the seeds when totally dry (you can dry them in a warm dry place) in sealed bags or envelopes marked with the date and variety.

useful links:

Our Sowing chart

The quantities are for a group of about 9 people Note - I am sowing 2 to 3 weeks earlier this year due to the hot spring here in the East


month vegetable varieties where to sow G'house includes pollytunnel transplant to plot.. how much distance between rows (cm) distance along row (cm) "intersow" means rows next to rows, not plants next to plants.                  Notes done?
Jan Tomatoes Moneymaker Propagator G'house          
    Gardeners delight Propagator G'house          
  Pepper (sweet)   Propagator G'house          
Early Feb Garlic       4 rows 60 25 if not done in Autumn  
  Cabbage   G'house   30 plants 100 80 intersow with spinach  
Aubergene   Propagator G'house          
Late Feb Tomato   Propagator G'house 2 x 10 plants     intersow parsley + basil  
Pepper Propagator G'house 2 x 5 plants plus 1 chilli
  Lettuce   Propagator   2 rows        
  Parsnip       2 rows 50 see pkt intersow lettuce  
  Radish       2 rows     intersow broad beans  
  Beans Broad     1 double row   25 intersow parsnips  
  french  climbing G'house G'house          
  Courgette   Propagator G'house          
  Pea sugar snap G'house G'house          
  Celeriac/Celery   Propagator            
Early Mar Tomato (outdoor) Propagator   2 x 15 plants 100 80 intersow spinach + parsley  
  Beetroot out/in     1 row 60   intersow spring onions  
  Calabrese   G'house   20 plants 100 (i/p) 100 (i/p) interplant calendula + tagetes  
  Spr onion       1 row     intersow beetroot  
Late Mar Leeks   s'bed/tray   300 plants 70 (i/p) 25    
  Onion sets normal     2 packs 40 20 intersow carrots  
    red baron     2 packs        
  Lettuce   G'house   2 rows        
  Carrot early     4 rows     interplant spring onions  
  Potatoes early     3 rows        
  quinoa   G'house         plant out in may  
Early Apr Basil     G'house? 80 plants + loose      
tomatoes   plant out G'house          
  Peas sugar snap   G'house 15 plants        
climbing purple beans french   G'house       in-between tomatoes  
  Coriander   GH + o/door   1 metre        
  Courgette   G'house G'house 5 plants        
  Spinach   G'house   2 metres        
    perpetual     2 rows        
  Swiss Chard       2 rows 60   with peas and beans  
  Parsley       1 row     some between tomatoes  
  Cabbage Red G'house   40 plants 80 60 interplant calendula + tagetes  
    Summer     20 plants 80 60 ..  
    Savoy     30 plants 80 60 ..  
  Brussels   G'house   20 plants 100 80 mix with flowers  
  Spr Brocc purple G'house   15 plants 100 80 ..  
    white     15 plants 100 80 ..  
  Cauliflower   G'house   20 plants 100 80 ..  
  curly Kale   G'house   15 plants     ..  
  Celery   G'house   30 plants 80 40    
  Celeriac   G'house   20 plants 70 25 intersow runner beans  
  Radish       1 row 70 25    
  Potatoes no late ones this year     10 rows        
Late Apr Lettuce   anywhere   2 rows        
  Squash   G'house (pots)   10 plants        
  Courgette outdoor G'house (Pots) Polytunnel 5 plants        
  Pumpkin   G'house (pots)   2 plants        
  Beans Pea     20 plants        
    Runners     10 plants     intersow spinach or celery  
    French     1 row     intersow celery  
  Turnips       1 row        
  Carrots maincrop     7 rows     intersow onions  
  Peas Sugar snap G'house   1 row     interplant Swiss Chard  
  Aubergine plants   G'house 10 plants        
  Pepper plants   G'house 10 plants        
  Cucumber   G'house G'house 10 plants     interplant fennel  
  Spring onion       1 row        
Early May Sweetcorn   G'house (pots)   2 x 80 plants 90/100 50/60 plant out late May  
  Coriander outdoor     1 row        
  Beetroot white & red     1 row 30   intersow Dill  
Late May Lettuce       2 rows        
  Swede       2 rows        
  Calabrese   G'house   20 plants     interplant flowers  
  Fennel       2 rows     interplant with cucumber  
  Radish       1 row        
  Raddicchio       1 row        
  Tagetes             and Zinnia  
Jun Spr onion       2 rows        
  Pak Choi       1 row        
  Cabbage chinese     1 row        
  Autumn &
winter cabbage
& cauli
More beans &
July Lettuce Fortune     2 rows        
mid to late July
      1 row     To avoid carrot fly  
Betroot             white and red  
Aug Coriander outdoor     1/2 row        
  Parsley     G'house 1/2 row        
  Spring cabbage                
  spring cauli                
  Cabbage Spr Hero     30 plants        
  Raddicchio       1 row        
  Endive       1 row        
  Rocket       1 row        
  Chicory       1 row        
  Mizuna       1 row        
  Onion seed       1 row     late August for over wintering  
Giant winter spinach                
Sept/October Coriander   G'house   1 metre        
  Spinach salad G'house   1 metre        
  Endive   G'house   1 metre        
  Mizuna   G'house   5 metre        
  Rocket and outside G'house   5 metre     hardy enough for outdoors  
  Mix salad   G'house   5 metre        
  japanese onion sets       one pack     for over wintering  
onion seed       one packet     to plant out in spring  
round seeded pea       one row     to resist mildew, cloche when frost threatens  
carrot   greenhouse            
carrot   outside         cloche when frost threatens  
sugar snap   G' house            
beetroot   G'house            
pak choi   G'house            
hardy lettuce                      G'house All Year Round    
********** Save seed from seeding plants    
October carry on as per September                
Nov Beans Broad     1 double row        
  Garlic       4 rows