My plant is 5 weeks into veg , and Most of the leaves are sick but it has a very strong and thick stem thats about 9 inches, there are little leaves that are growing healthy, but for the most part all the big leaves are gone, Can i switch to flowering in this condition and still be able to produce buds ? Will it grow leaves during the flowering stage as it grows buds til harvest?
Short answer no. Chances are the stress from the change in light cycles is the final nail in the coffin. Your plant needs it fan leaves to gather energy, without them there will be no new growth. Read some grow journals on this site and try to figure out what your doing wrong then when your ready start a new plant.