hi OP

i think it could have been my thread you have seen cucumbers in ( grow-bag monthly).

today i harvested my first. and this is how i tell if my cumber is ready or not.

take cumber in hand and have a weight guess now being careful not too break the skin squeese lightly.

Dark hard skin good weight = roughly at its best

Dark to lighter soft skin good weight = good too go also

yellowing skin good weight = can be picked but gone past its best.

how too get the best from your cucumber plant. hmmm thats a hard question but my first time this year i pinched out all flowers once i had around 5-8 cucumbers forming you want the plant too now place all energy into getting those fruits fat and full of water. using the cucumber house idea can be better, your pic is ideal. now your cucumber is on the box raised up. next time round place cucmber plant into ground or even a growbag. a good stake or too for plant too climb. once it get high enough then train into center of roof apex like you have this way fruit will stay of ground and no problem of fruit rot.

nip out female flowers and male flowers you dont have too remove all but this will force plant into fruit building. you will need too do this every other day as you will find they realy do make alot of flowers. WATER these drink the stuff and the fruit is all water so more you water the better but in moderation dont drown your plants !!!

i have long green ridge cucumbers and tend too pick them at around 20-28cm long. pick just before the tip of cucumber starts too yellow will try get a pic uploaded of my first harvest so you can rough guess yours