SALAD CROP PROJECTS 141 



head, and (4) cos lettuce, with leaves straight and stiff and 

 forming a conical or cylindrical head. 



1. Is the wild form of lettuce known ? 



2. When does lettuce produce seed ? 



3. What are the types of cultivated lettuce from the botanical 



point of view ? 



Project Outline 



1. Why grow lettuce ? 



2. Selecting location. 



3. Choosing varieties. 



4. Obtaining seed. 



5. Constructing the hotbed. 



6. Constructing the cold frame. 



7. Making plant boxes. 



8. Making straw mats. 



9. Starting early plants. 



10. Preparing the soil. 



11. Planting in the garden. 



12. Sowing in the garden. 



13. Companion cropping. 



14. Irrigating. 



15. Cultivating. 



16. Combating insects and diseases. 



17. Harvesting and marketing. 



18. Forcing. 



1. Why grow lettuce ? — Lettuce is nearly always included in 

 the planting of home gardens. It is also grown on an enormous 

 scale for commercial purposes. The intensive market gardeners 



