Picture posting is enabled for all :)
suggestion for thin spears were either over cropping and/or soil 'running thin' with nutrients. Advise was to give general feed growmore/chicken manure pellets/BFB before growth come through (in March) and mulch with compost/leafmould/spent potting compost etc.. to 'condition' the soil.
hard to assess if in a cold late year like this you could stop picking spears later or follow the same rule of not picking after 21st june ?